Question

simplify the polynomial x2- 9

Answer 1

Answer:

±3 .

Step-by-step explanation:

x² - 9 can be written as (x-3)(x+3) .

Which can be simplified into x = ±3 .

Answer 2

x=-3 (or) x=+3

Step-by-step explanation:

=x²-9

=x²-3² is in the form of ( a²- b²)= (a+b) (a-b)

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

=x+3=0 (or) x-3=0

=x=-3 (or) x=+3