# Algebra

Completely factor the following expression:100y2 â€“ 36z2

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1. As in the previous question, factor out the numeric factors first:
100y2 â€“ 36z2
=4(25y²-9z²)
Recognize that the expression is a difference of two squares, then use
(a²-b²)=(a+b)(a-b)
to complete the solution.

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