Waht Is The Indicated Product Of (2h+7) (2h-7)

Waht is the indicated product of (2h+7) (2h-7)

 

By FOIL method:

(2h + 7)(2h - 7)

(2h)(2h)

4h^2

(2h)(-7)

-14h

(7)(2h)

14h

(7)(-7)

-49

4h^2 - 14h + 14h - 49

4h^2 - 49

or by using the algebra multiplication property etc.

such that (a + b)(a - b) = a^2 - b^2

so

(2h + 7)(2h - 7)

a = 2h

b = 7

4h^2 - 49