if you FOIL this one out it ends up being
(5b-6)(5b+6)
=25b^2 - 30b + 30b - 36
=25b^2 - 36
2 Answers By Expert Tutors
Jason S. answered • 11/20/13
Tutor
4.9
(116)
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(x+y) (x-y) = x^2 - y^2
x = 5b
y = 6
(5b)2 - 62 = 25b2 - 36
Also, by the distributive property:
(5b - 6) (5b + 6)
5b(5b+6) - 6(5b+6)
25b2 +30b - 30b - 36
25b2 - 36
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