А2.а)(12х-3х³)/(6х+6)=3х(4-х²)/6(х+1)=х(2-х)(2+х)/2(х+1)
б)(у-3)/(у²-6у+9)=(у-3)/(у-3)²=1/(у-3)
в)(m²-4)/(m²+4m+4)=(m-2)(m+2)/(m+2)²=(m-2)/(m+2)
г)(n²-n-1)/(n⁴-n³-n²)=(n²-n-1)/n²(n²-n-1)=1/n²
д)(16х+8у)/(9у+18х)=8(2х+у)/9(у+2х)=8/9
е)(х²-4х)/(28-7х)=х(х-4)/7(4-х)
ж)(18у²-9у)/(3у²-6у³)=9у(2у-1)/3у²(1-2у)=3(2у-1)/у(1-2у)
В1. (4х²-9)/(9-12х+4х²)=(2х-3)(2х+3)/(2х-3)=2х+3
2×(3/4)+3=1,5+3=4,5
Ответ:4,5
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Answers & Comments
А2.а)(12х-3х³)/(6х+6)=3х(4-х²)/6(х+1)=х(2-х)(2+х)/2(х+1)
б)(у-3)/(у²-6у+9)=(у-3)/(у-3)²=1/(у-3)
в)(m²-4)/(m²+4m+4)=(m-2)(m+2)/(m+2)²=(m-2)/(m+2)
г)(n²-n-1)/(n⁴-n³-n²)=(n²-n-1)/n²(n²-n-1)=1/n²
д)(16х+8у)/(9у+18х)=8(2х+у)/9(у+2х)=8/9
е)(х²-4х)/(28-7х)=х(х-4)/7(4-х)
ж)(18у²-9у)/(3у²-6у³)=9у(2у-1)/3у²(1-2у)=3(2у-1)/у(1-2у)
В1. (4х²-9)/(9-12х+4х²)=(2х-3)(2х+3)/(2х-3)=2х+3
2×(3/4)+3=1,5+3=4,5
Ответ:4,5