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Solve the equation by factoring. z^2-6z-27=0
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4 votes
Solve the equation by factoring. z^2-6z-27=0

User Coppro
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1 Answer

4 votes
z² - 6z - 27 = 0
z² + 3z - 9z - 27 = 0
z(z+3) - 9(z+3) = 0
(z+3)(z-9) = 0

z + 3 = 0 or z - 9 = 0
z = -3 z = 9

Answer: z=-3 and z=9
User Tnemesis
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