Question

Factorize the following a²-9​

Answer 1

Step-by-step explanation:

a² - 9

by the formula x²-y² =(x+y) (x-y)

a²-9 = (a+3)(a-3)

Answer 2

Answer:

a² - 9² = (a + 3)(a - 3)

Step-by-step explanation:

a² - b² = (a + b)(a - b)

By using above formula,

a² = a², b² = 9

a² - 9² = (a + 3)(a - 3)

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