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Solve the equation by factoring. z2 – 6z – 27 = 0

z = –3 or z = 9
z = –3 or z = –9
z = 3 or z = –9
z = 3 or z = 9

Respuesta :

Answer:

The value of z = -3 or z = 9

Step-by-step explanation:

Given equation => z² – 6z – 27 = 0

=> z² - 9z + 3z - 27 = 0

=> z(z -9 ) +3 (z - 9 ) = 0

=> (z + 3) (z - 9)

=> z = -3 or z = 9

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