Danm Math...

So... I got some stuff as math homework. Anyone got a clue?
Need to write this simpler removing the brackets.

2(a-3)+5(a+31)

Need to write it down more easily , teacher isn't a big help.. Since i saw some ppl posting they like math i figured i'd ask

Don't really need the awnser, just a way to solve these questions

Teachers are always not a big help

I don't understand your question. Can you rephrase it please? Normally I'd be able to do it.

Originally Posted by Vine

I don't understand your question. Can you rephrase it please? Normally I'd be able to do it.

Well made one in class, this was the right awnser dont ask me how i did it.

How do i solve such problems?
It has to be made shorter and remove the (...) So it becomes a simple sum like 7a+149 << the correct awnser on the question.

Originally Posted by SammyDoge1

Well made one in class, this was the right awnser dont ask me how i did it.

How do i solve such problems?
It has to be made shorter and remove the (...) So it becomes a simple sum like 7a+149 << the correct awnser on the question.

Distribute and add like terms. This is like pre-algebra...

Originally Posted by SammyDoge1

Well made one in class, this was the right awnser dont ask me how i did it.

How do i solve such problems?
It has to be made shorter and remove the (...) So it becomes a simple sum like 7a+149 << the correct awnser on the question.

You can always vm/pm me if you don't understand something, and guys^ not everyone is good at maths. If he has trouble doing it then he needs to get it explained well. I can always help someone, especially when we speak the same language.

Originally Posted by Vine

You can always vm/pm me if you don't understand something, and guys^ not everyone is good at maths. If he has trouble doing it then he needs to get it explained well. I can always help someone, especially when we speak the same language.

Exactly.

Originally Posted by CaT-

That question is way easy.

Enlighten me on how to solve such questions.

2(a-3)+5(a+31)=
(2a -6) + (5a + 155)=
2a + 5a -6 + 155=
7a + 149.
You're really 17? :\
I'm not trying to offend but i'm 17 and that's 7th grade math for me :\

Originally Posted by Youtro

2(a-3)+5(a+31)=
(2a -6) + (5a + 155)=
2a + 5a -6 + 155=
7a + 149.
You're really 17? :\
I'm not trying to offend but i'm 17 and that's 7th grade math for me :\

Maybe for you, but i suck at math, I just don't get how you do that(the steps to follow). Could you give me the steps to walk tho, so i maybe can understand how your doing it?

Originally Posted by CaT-

That question is way easy.

Maybe for you, not everyone is equally good at math you know.

Originally Posted by SammyDoge1

Maybe for you, but i suck at math, I just don't get how you do that(the steps to follow). Could you give me the steps to walk tho, so i maybe can understand how your doing it?

Maybe for you, not everyone is equally good at math you know.

Do you know your order of operations? PEMDAS (Parentheses -> Exponents -> Multiplication -> Division -> Addition -> Substract).

Equation: 2(a-3)+5(a+31)

2(a-3) means multiply everything in the parenthethes by 2. You have distribute that 2 to everything inside of the parentheses
2 * a = 2a
2 * -3 = -6

So now you're left with: 2a - 6 + 5(a + 31)

Once again, 5(a - 31) means multiply everything in the parentheses by 5. Remember distribute a.k.a. FOIL (First-> Inner-> Outer-> Last)!
5 * a = 5a
5 * 31 = 155

So now you're left with: 2a - 6 + 5a - 155

Simplify and combine like terms:
2a + 5a = 7a
-6 + 155 = 149

Final Answer: 7a + 149

Here's a video that should explain it very well:

https://www.khanacademy.org/math/alg...g-polynomials1

Originally Posted by Woodhouse

Do you know your order of operations? PEMDAS. Parenthethis -> Exponents -> Multiplication -> Division -> Addition -> Substract
2(a-3)+5(a+31)

2(a-3) means multiply everything in the parenthethis by 2. You have distribute that 2 to everything in the paranthesis.

2 * a = 2a
2 * -3 = -6

So now you're left with: 2a - 6 + 5(a + 31)

Once again, 5(a - 31) means multiply everything in the paranthesis by 5. Remember distribute a.k.a. FOIL (First-> Inner-> Outer-> Last)!

5 * a = 5a
5 * 31 = 155

So now you're left with: 2a - 6 + 5a - 155

Simplify and combine like terms:

2a +5a = 7a

-6 +155 = 149

Final Answer: 7a + 149

Here's a video that should explain it very well:

https://www.khanacademy.org/math/alg...g-polynomials1

Omg <3 Thankyou So much, it actualy shows me how its done, so you just multiply the number outside the () with the numbers inside?

So, 3(2a+7) will become 6a+21?

If im correct?

Originally Posted by SammyDoge1

Omg <3 Thankyou So much, it actualy shows me how its done, so you just multiply the number outside the () with the numbers inside?

So, 3(2a+7) will become 6a+21?

If im correct?

Yes. You are correct. Distribute the outside term with ALL terms inside of the parentheses. The outside number isn't always just a number, but the same principal applies e.g.

2x(a² + -4a + 4) =
2xa² - 8xa + 8x

Originally Posted by Woodhouse

Yes. You are correct. Distribute the outside term with ALL terms inside of the parentheses. The outside number isn't always just a number, but the same principal applies e.g.

2x(a² + -4a + 4) =
2xa² - 8xa + 8x

Cool Cool, Thanks for the explanation! Think i get it now.

Originally Posted by Youtro

2(a+b)=2a + 2b.
Pathetic

Lol, Its kinda hard to understand if you get 2(a-3)+5(a+31) And the awnser from the teacher, without any explanation.. If you'd told me it in this way, i would have come a far way. thanks i guess..

That question is way easy.

2(a+b)=2a + 2b.
Pathetic

Danm Math...

Similar Threads

Tags for this Thread