which of the following is a factor of z2 -4z-12?
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which of the following is a factor of z2 -4z-12?
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Step-by-step explanation:
[tex] {z}^{2} - 4z - 12[/tex]
[tex] = {z}^{2} - (6 - 2)z - 12[/tex]
[tex] = {z}^{2} - 6z + 2z - 12[/tex]
[tex] = z(z - 6) + 2(z - 6)[/tex]
[tex] = ( z - 6)(z + 2)[/tex]