Answer:
Step-by-step explanation:
(x-3)*(x+3)
we begin by expanding and then simplifying
= (x²+3x-3x-9)
= x² - 9
x² - 9
hello :
(x - 3 ) (x + 3) = x²+3x-3x-9
(x - 3 ) (x + 3) = x² - 9
