Question

Plx explain how to do this
ty

Answer 1

The special product formula is

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

Put a=5x, b=8

`(a-b)(a+b)`

`= a^2-b^2`

`=(5x-8)(5x+8)`

`=(5x)^2-8^2`

`=25x^2-8^2`

`=25x^2-64`

Answer 2

using (a-b)(a+b)=a²- b² simplifyed is (5x)²-8² which translate to your final answer 25x² - 64