Question

Factor completely: 80x2 – 125

Answer 1

5( 4x-5)(4x+5)

Explanation:

80x^2 – 125

Factor out a 5

5( 16 x^2 - 25)

Inside the parentheses is the difference of squares

5 ( (4x)^2 - 5^2)

We know the difference of squares is (a^2 - b^2) = (a-b) (a+b)

5( 4x-5)(4x+5)

Answer 2

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

Explanation:

`80x^2-125= \\\\5(16x^2-25)= \\\\5(4x-5)(4x+5)`

Hope this helps!