Question

Solve the quadratic equations by factorization method x²-9 = 0 (1)​

Answer 1

Answer:

(x - 3) (x + 3)

Step-by-step explanation:

x² - 9 = 0

By using identity:

a² - b² = (a - b) (a + b)

↪ x² - 9 = (x)² - (3)²

= (x - 3) (x + 3)

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Answer 2

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.

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