Andrew M. answered • 04/08/16
Tutor
New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors
There is a formula for the difference of two squares.
a2-b2 = (a-b)(a+b)
Note that z2 - 25 = (z)2 - (5)2 so this is the difference
of two squares.
z2 - 25 = (z-5)(z+5)
