19-02-2020
Mathematics

contestada

z – 15

z + 90

z + 15

z – 9

z 15 z 90 z 15 z 9 class=

Respuesta :

Hrishii Hrishii

19-02-2020

Answer:

z + 15

Step-by-step explanation:

[tex] {z}^{2} + 9z - 90 \\ \\ = {z}^{2} - 6z + 15z - 90 \\ \\ = z(z - 6) + 15(z - 6) \\ \\ = (z - 6)(z + 15) \\ [/tex]

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