Question

Simplify (2x+5)(2x−5).

A) ( 4x − 25 )

B) ( 4x^2 − 10 )

C) ( 4x^2 − 25 )

D) ( 4x^2 − 20x − 25 )

Answer 1

C See below

Explanation:

Use FOIL to find answer

First, Outer, Inner, Last

First 2x times 2x = 4x²

Outer 2x times 5 = - 10x

Inner 5 times 2x = 10x

Last 5 times 5 = - 25

so equation ends up 4x² - 10x + 10x - 25

or 4x² - 25

Answer 2

Solve For X

A) X = 6.25

B) X =