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Z – 15 z + 90 z + 15 z – 9

Z – 15 z + 90 z + 15 z – 9
asked 92.0k views
2 votes
Z – 15

z + 90

z + 15

z – 9

Z – 15 z + 90 z + 15 z – 9-example-1
asked
User Alastair Wilkes
by
8.4k points

1 Answer

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) \\

answered
User Dwix
by
8.1k points
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