itzariah itzariah

21-09-2020
Mathematics

contestada

factor z^2+7z-18
what is the factor expression?

Respuesta :

ali63876007 ali63876007

21-09-2020

Answer:

z²+7z-18=0.

z²+9z-2z-18=0.

(z²+9z)-(2z-18)=0.

z(z+9)-2(z+9)=0.

(z-2)(z+9)=0.

(z-2)=0 or (z+9)=0.

z-2=0 or z+9=0.

z=2 or z=-9.

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