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ahmatbayramkul
@ahmatbayramkul
March 2022
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упростите выражение (a-1)^2-(a-2)(a+2)+(a+3)(a-1)-(a-2)^2
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Evreika77
Verified answer
(a-1)^2-(a-2)(a+2)+(a+3)(a-1)-(a-2)^2 = a
²-2a+1-(a²-4)+(a²-a+3a-3)-(a²-4a+4) =
a² -2a+1-a²+4+a²-a+3a-3-a²+4a-4=4a+1
2 votes
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Verified answer
(a-1)^2-(a-2)(a+2)+(a+3)(a-1)-(a-2)^2 = a²-2a+1-(a²-4)+(a²-a+3a-3)-(a²-4a+4) =a² -2a+1-a²+4+a²-a+3a-3-a²+4a-4=4a+1