Ответ:
а) (3x-5y)*(3x+5y) = (3х)²-(5у)²=9х²-25у²
б) (5b-7a)²=25b²-70ab+49a²
в) (2x³ +7y²)²=4х⁶+28х³у²+49у⁴
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Ответ:
а) (3x-5y)*(3x+5y) = (3х)²-(5у)²=9х²-25у²
б) (5b-7a)²=25b²-70ab+49a²
в) (2x³ +7y²)²=4х⁶+28х³у²+49у⁴