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OpenStudy (anonymous):
Factor Completely: 4x2 − 81 (4x − 9)(x + 9) (2x + 9)(2x + 9) (2x + 9)(2x − 9) (2x − 9)(2x − 9) @Mertsj The first one?
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OpenStudy (luigi0210):
Do you the difference of perfect squares?
OpenStudy (anonymous):
Is my answer wrong?
OpenStudy (luigi0210):
|dw:1372273447864:dw| If we FOIL the first one we get this
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