Question

How do you factor completely `16x^2 - 25y^2`?

Answer 1

`(4x-5y)(4x+5y)`

Explanation:

`16x^2−25y^2`
`=(4x)^2-(5y)^2`
`~~a^2-b^2=(a-b)(a+b)`

`=(4x-5y)(4x+5y)`