Question

Find the factors of x2-9

Answer 1

Answer:

One way to solve the quadratic equation x2 = 9 is to subtract 9 from both sides to get one side equal to 0: x2 – 9 = 0. The expression on the left can be factored: (x + 3)(x – 3) = 0. Using the zero factor property, you know this means x + 3 = 0 or x – 3 = 0, so x = −3 or 3.

Step-by-step explanation:

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Answer 2

x²-9

= x²-3²

with the identity :

(a+b)(a-b)

= a²-b²

so, x²-3²

= (x-3)(x+3)

so, factors of x²-9 :

x+3 and x-3

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