Z – 15 z + 90 z + 15 z – 9

asked Aug 20, 2021 92.0k views

2 votes

Z – 15

z + 90

z + 15

z – 9

3.4k points

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6 votes

Answer:

z + 15

Explanation:

${z}^(2) + 9z - 90 \\ \\ = {z}^(2) - 6z + 15z - 90 \\ \\ = z(z - 6) + 15(z - 6) \\ \\ = (z - 6)(z + 15) \\$

Dwix answered Aug 25, 2021

by Dwix

3.2k points

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