What does (2x^2+3x-4)+(x^2-x-2) equal?

3x2+2x+2

Step-by-step explanation:

(2x2+3x+4)+(x2-x-2)

2x2+3x+4+x2-x-2

Like terms

1) numbers without variables: +4 and -2

2) numbers with a single x variable: +3x and -x

3) numbers with a x2 variable: +2x2 and +x2

Combine like terms

1) +4-2=2

2) +3x-x=2x

3) +2x2+x2=3x2

Add the combined terms together to get your answer

3x2+2x+2

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24