-7x^2-8x-9 = -8x^2 Solve by factoring

-7x^2-8x-9= -8x^2

-7x^2-8x-9+8x^2=-8x^2+8x^2

1x^2-8x-9=0

(x )(x ) ( +1)( -9)

(x+1)(x-9)

Check:

(x+1)(x-9)

(x)(x) (x)(-9) (1)(x) (1)(-9)

x^2 -9x +1x -9

x^2 -8x -9

Simplify:

(x+1)

Solve:

(x+1)=0

x+1-1=0-1

x=-1

Simplify:

(x-9)

Solve:

(x-9)=0

x-9+9=0+9

x=9