Question

3x2 - (2x2 - 12) + (- 20)

Answer 1

do u mean 3x2 or 3^2?

Answer 2

3x^2-2x^2+12-20
x^2-8

Answer 3

yeah sorry my bad

Answer 4

In that case distribute the negative sign, and combine like terms

Answer 5

3x^2+2x^2+12+20

Answer 6

but you didn't combine like terms

Answer 7

I keep messing up on the combing part

Answer 8

It wil be a negative 20 because + - =-

Answer 9

3x^2 - (2x^2 - 12) + (- 20)-distribute
3x^2-2x^2+12-20-combine
x^2+12-20

Answer 10

now we would factor but there isn't 2 numbers that have a different sign that multiply to 20 and add to 12

Answer 11

Oh so I am supposed to be using the distribute property?

Answer 12

go to www. wolframalpha.com and put in your equation. answer is -6

Answer 13

idk what does your book tell you? simplify? evaluate?

Answer 14

Yeah, its easy to cheat. But I want to learn

Answer 15

it is not cheating if they show u steps that u can see. that is what i use it for... glad to hear you say that though :)

Answer 16

I got the problem offline

Answer 17

oh there is no x so it become x^2-8

Answer 18

So now what?