Factor and Zero Product Property

Yes, she factored correctly and then used the zero product property

No, she didn't factor correctly so the rest of her work is wrong.

No, she did not set the equation equal to zero before factoring.

If there is a GCF

What the a value is

All terms are combined

Zero Product Property

(x + 12)(x - 3)

x = 12 and x = -3

x = -12 and x = 3

(x - 9)(x - 4)

Plug in 0 and solve the expression.

Factor then set each factor equal to zero and solve to find x-intercepts

Set the expression equal to zero and solve 

Factor then set each factor equal to zero and solve to find y-intercepts

{ -5/2, -2/5 }

{ -5/2, 2/5 }

{ 5/2, 2/5 }

{ 5/2, -2/5 }

x = 1/2, -4

x = 1/2, 4

x = 2, -4

x = -2 4

w=0 and w=-1

w=0 and w=1

w=1 and w=-1

w=1 and w=5

r=15 and r=2

r=-15 and r=1/2

r=0 and r=1/2

r=0 and r=2

w=0 and w=-1

w=0 and w=1

w=1 and w=-1

w=1 and w=5

-6

7

-7

-1

1