Question

factorise the following expressions is a² - 64​

Answer 1

Answer:

$a^2 - 64$

$a^2- 8^2$

$(a+8)(a-8)$

Using formula

$x^2-y^2=(x+y)(x-y)$

Answer 2

a^2-8^2
It look like a^2-b^2=(a+b)(a-b)
=(a+8)(a-8)