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The zero product property is used to solve equations using factoring.

Ex x2 + 5x = 4 .... 1st rearrange to = 0

x2 - 3x- 4 = 0 .... now factor left side

(x-4)(x+1) = 0 .... now make 2 separate equations and solve

x-4 = 0 so x = 4 .... x+1 = 0 so x = -1

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