10. Solve by factoring: y = x2 - 6x + 9

for y = 0.

x=3

Step-by-step explanation:

y = x^2 - 6x + 9

What two numbers multiply to 9 and add to - 6

-3*-3 = 0

-3+-3 = - 6

y = (x-3) (x-3)

Setting y = 0

0 = (x-3) (x-3)

x-3 = 0 x-3 = 0

x=3 x=3