Question

Determine the factors of the expression x^2 - 9

a) (x - 9) (x+9)
b) (x - 3) (x+3)
c) (x - 3)^2
d) (x + 3)^2

Answer 1

Explanation:

The answer is B.

Use the sum-product pattern

2+3−3−9

Common factor from the two pairs

2+3−3−9x2+3x−3x−9

(+3)−3(+3)

Rewrite in factored form

(+3)−3(+3)

Solution:

(−3)(+3)

‘Hope it Helps!