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makvak
@makvak
July 2022
1
2
Report
№3 разложите на множители
5x^2-y^2
3x^2-6xy+3y^2
(x-2)^2-16
81y^4-x^4
№4 упростите выражение
(a^2+4a)^2-a^2(a-2)(a+2)-4a^2(2a-1)
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m11m
5х²-у²=(√5 х-у)(√5 х+у)
3х²-6ху+3у²=3(х²-2ху+у²)=3(х-у)²
(х-2)²-16=(х-2-4)(х-2+4)=(х-6)(х+2)
81у⁴-х⁴=(9у²-х²)(9у²+х²)=(3у-х)(3у+х)(9у²+х²)
(а²+4а)²-а²(а-2)(а+2)-4а²(2а-1)=а⁴+8а³+16а²-а²(а²-4)-8а³+4а²=
=а⁴+8а³+16а²-а⁴+4а²-8а³+4а²=20а²
1 votes
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Answers & Comments
3х²-6ху+3у²=3(х²-2ху+у²)=3(х-у)²
(х-2)²-16=(х-2-4)(х-2+4)=(х-6)(х+2)
81у⁴-х⁴=(9у²-х²)(9у²+х²)=(3у-х)(3у+х)(9у²+х²)
(а²+4а)²-а²(а-2)(а+2)-4а²(2а-1)=а⁴+8а³+16а²-а²(а²-4)-8а³+4а²=
=а⁴+8а³+16а²-а⁴+4а²-8а³+4а²=20а²