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drmarmok
@drmarmok
August 2022
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№ 644. Упростите выражение:
A) (а^2 - 0,45а + 1,2) + (0,8a^2-1,2а) –(1,6а^2 - 2а)
Б) (у^2- 1,75у – 3,2) - (0,3у^2 + 4) - (2y - 7,2) =
В) 6xy – 2x^2– (3xy + 4х^2 +1) - (-xy – 2х^2 - 1) =
Г) - (2ав^2– ав + в) + Зав^2- 4в - (бав – ав^2) =
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