Question

Solve the quadratic equation y2 - 7y - 18 = 0 by factoring.

Answer 1

then (x - 2) = 0

and

(x + 9) = 0

x = 2
x = -9

Answer 2

what 2 factors add to -7 and multiply to - 18?

-9 and 2 ? yes ?

(x + 2)(x - 9)

Answer 3

\[y ^{2} - 7y -18 = 0\]\[(y+2)(y-9)=0\]\[y=2 , y=-9\]