Question

X2-4 open the formula

Answer 1

Hello!

Answer:

`\Large \boxed{\sf (x + 2)(x-2)}`

Explanation:

This expression is a remarkable identity:

`\sf a^(2) - b^(2) = (a + b)(a - b)`

Apply the remarkable identity:

`\sf x^(2) -4\\\\= x^(2) -2^(2) \\\\\boxed{\sf = (x + 2)(x-2)}`