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20.07.2019 •
Mathematics
Factor the polynomial. 7x2 + 68xy - 20y2 a) (7x - 2y)(x + 10y) b) (7x - 10y)(x - 2y) c) (7x + 10y)(x + 2y) d) (7x + 2y)(x - 10y)
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Ответ:
7x2 + 68xy - 20y2
Factoring we have:
(7x-2y) (x + 10y)
We verify the factorization:
7x2 + 70xy - 2xy - 20y2
Rewriting we have:
7x2 + 68xy - 20y2
Therefore, the factorization is correct.
A) (7x - 2y) (x + 10y)
Ответ:
B.
Step-by-step explanation: