Question

Select the correct answer.
Factor completely
5x² - 45
OA (5x + 9)(x - 5)
O.B. 5(x - 45)
OC. 5(x-9)(x+ 9)
OD. 5(x+3)(x - 3)
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Answer 1

D. 5(x+3)(x-3)
5(x2 -3squared)
5(x+3)(x-3)

Answer 2

Answer:

D. 5(x + 3)(x - 3)

Step-by-step explanation:

Both terms are perfect squares, therefore we will factor using the difference of squares formula;

a² - b² = (a + b) (a - b)

5(x + 3)(x - 3)

5(x² - 9)

(5x² - 45)

5x² - 45