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Dmitry_Shevchenko [17]
3 years ago
12

How do I factor this completely?

Mathematics
1 answer:
anyanavicka [17]3 years ago
8 0
Factor the following:
a^2 - a - 90
The factors of -90 that sum to -1 are 9 and -10. So, a^2 - a - 90 = (a + 9) (a - 10):
Answer:  (a + 9) (a - 10)
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