Question

Find the sum of 3x^2 + 5x - 6 and -x^2 + 3x + 9 , please answer this!!

Answer 1

2x^2+8x+3

Explanation:

Combine like terms

3x^2+5x+-6+-x^2+3x+9

(3x^2+-x^2)+(5x+3x)+(-6+9)

= 2x^2 + 8x + 3

Answer 2

Explanation:

3x2+5x−6−x2+3x+9

=3x2+5x+−6+−x2+3x+9

Combine Like Terms:

=3x2+5x+−6+−x2+3x+9

=(3x2+−x2)+(5x+3x)+(−6+9)

=2x2+8x+3

Answer is: =2x2+8x+3