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Olov11111111
@Olov11111111
July 2022
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1.Упростите выражения :
а)(4х^2+3y)(y-2x^2)
b)(a^2-b^2)(2a+b)-ab(a-b)
c)(5x+2)(x^2-2x-3)
d)-3b(1-b^2)(5b+2)
2.Докажите тождество :
х^4-1=(x+1)(x^3-x^2+x-1)
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ManyaGor
А) 4х^2у-8х^2+3у^2-6х^2у= -2х^2у-8х^4+3у^2Б) 2а^3+ба^2-2аб^2-Б^3-а^2+аб^2=2а^3-аб^2-Б^3В)5х^3-10х^2-15х+2х^2-4х-6=5х^3-8х^2-19х-6Г) (-3б+3б^3(5б+2))=-15б^2-6б+15б^4+6б^3Х^4-1=Х^4-Х^3+Х^2-Х+Х^3-Х^2+х-1Х^4-1=Х^4-1
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