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24-07-2015
Mathematics

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how do solve z^2-6z-27=0 by factoring?

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24-07-2015

z^2−6z−27=0

Factor left side of equation.

(z+3)(z−9)=0

Set factors equal to 0.

z+3=0 or z−9=0

z=−3 or z=9

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