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polinaporayko
@polinaporayko
July 2022
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Выполните умножение:
а) (x-5)(x+5)
б) (3m-4n)(3m+4n)
в) (-7x-y)(7x-y)
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m11m
Verified answer
A) = x² -25
б) =9m² -16n²
в) = - (7x+y)(7x-y)= -(49x² -y²) =y² -49x²
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Answers & Comments
Verified answer
A) = x² -25б) =9m² -16n²
в) = - (7x+y)(7x-y)= -(49x² -y²) =y² -49x²