Question

please answer with explanation​

Answer 1

Step-by-step explanation:

(X+3)(X-3)

using identity (a-b)(a+b)=a^2-b^2

X^2-3^2=0

• X^2=9
• X^2 =3^2
• x=3

Answer 2

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• x² - 9

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(x + 3)(x - 3) is similar to (a + b)(a - b)

We know that, (a + b)(a - b) = a² - b²

Let's replace x in place a and 3 in place of b

Therefore,

• (a + b)(a - b) = a² + b²

Becomes -

• (x + 3)(x - 3) = (x)² - (3)² = x² - 9

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