202. Разложите многочлены на множители
1)2x2-4xy=
2)7y3+3y2=
3)ab+3a+3c+cb
4)10x+nm+10n+mx=
5)c2-d2=
6)b2+a2+2ab=
7)9-30p+25p2=
1)2x2-4xy=
2)7y3+3y2=
3)ab+3a+3c+cb
4)10x+nm+10n+mx=
5)c2-d2=
6)b2+a2+2ab=
7)9-30p+25p2=
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Answers & Comments
2)7y³+3y²=y²(7y+3)
3)ab+3a+3c+cb=a(b+3)+c(3+b)=(b+3)(a+c)
4)10x+nm+10n+mx=10(x+n)+m(n+x)=(x+n)(10+m)
5)c²-d²=(c-d)(c+d)
6)b²+a²+2ab=(b+a)²=(b+a)(b-a)
7)9-30p+25p²=(3-5p)²=(3-5p)(3+5p)