Question

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

Answer 1

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

Explanation: