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clavchikumnyashk
@clavchikumnyashk
October 2021
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Преобразуйте в многочлен стандартного вида:
а) (2а + 3b)(2a - 3b) б) 4a(a - 2) - (a-5)²
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natali3221
(2a+3b)(2a-3b)=4a²-9b² формула сокращённого умножения a²-b²=(a-b)(a+b), а=2а, b=3b
b) 4a(a-2)-(a-5)²=4a²-8a-a²+10a-25=3a²+2a-25
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Answers & Comments
b) 4a(a-2)-(a-5)²=4a²-8a-a²+10a-25=3a²+2a-25