分解因式题,急,今晚就要1.多项式15M3N2+5M2N-20M2N3的公因式是?2.若(P-Q)2-(Q-P)3=(Q-P)2.×E,则E是?3.24 M2N+18N的公因式?4.分解因式X(2-X)+6(X-2)=5.(X2+Y2)2-4 X2 Y2=6.9a2-6ab+3a有些平方的
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分解因式题,急,今晚就要1.多项式15M3N2+5M2N-20M2N3的公因式是?2.若(P-Q)2-(Q-P)3=(Q-P)2.×E,则E是?3.24 M2N+18N的公因式?4.分解因式X(2-X)+6(X-2)=5.(X2+Y2)2-4 X2 Y2=6.9a2-6ab+3a有些平方的
分解因式题,急,今晚就要
1.多项式15M3N2+5M2N-20M2N3的公因式是?
2.若(P-Q)2-(Q-P)3=(Q-P)2.×E,则E是?
3.24 M2N+18N的公因式?
4.分解因式X(2-X)+6(X-2)=
5.(X2+Y2)2-4 X2 Y2=
6.9a2-6ab+3a
有些平方的符号打不上来
可以到我空间的第一篇文章看题目
分解因式题,急,今晚就要1.多项式15M3N2+5M2N-20M2N3的公因式是?2.若(P-Q)2-(Q-P)3=(Q-P)2.×E,则E是?3.24 M2N+18N的公因式?4.分解因式X(2-X)+6(X-2)=5.(X2+Y2)2-4 X2 Y2=6.9a2-6ab+3a有些平方的
1.多项式15M3N2+5M2N-20M2N3的公因式是?
是5M²N
2.若(P-Q)2-(Q-P)3=(Q-P)2.×E,则E是?
左边=(Q-P)²-(Q-P)³=(Q-P)²×[1-(Q-P)]
E=1-Q+P
3.24 M2N+18N的公因式?
是6N
4.分解因式X(2-X)+6(X-2)
=-X(X-2)+6(X-2)
=-(X-2)(X-6)
5.(X2+Y2)2-4 X2 Y2=
=X^4+2X²Y²+Y^4-4X²Y²
=X^4-2X²Y²+Y^4
=(X²-Y²)²
=(X-Y)²(X+Y)²
6.9a2-6ab+3a
=3a(3a-2b+1)
1.5M²N
2.E=1-Q+P
3.6N
4.(X-6)(2-X)
5.(X-Y)²(X+Y)²
6.3a(3a-2b+1)
1.多项式15M3N2+5M2N-20M2N3的公因式是:5M^2N
15M^3N^2+5M^2N-20M^2N^3
=5M^2N(3MN+1-4N^2)
2.若(P-Q)^2-(Q-P)^3=(Q-P)^2×E,则E是:(1+P-Q)
(P-Q)^2-(Q-P)^3
=(P-Q)^2+(P-Q)^3
=(P-Q)^2(1+P-Q)
3.24...
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1.多项式15M3N2+5M2N-20M2N3的公因式是:5M^2N
15M^3N^2+5M^2N-20M^2N^3
=5M^2N(3MN+1-4N^2)
2.若(P-Q)^2-(Q-P)^3=(Q-P)^2×E,则E是:(1+P-Q)
(P-Q)^2-(Q-P)^3
=(P-Q)^2+(P-Q)^3
=(P-Q)^2(1+P-Q)
3.24 M2N+18N的公因式:6N
24 M^2N+18N
=6N(4M^2+3)
4.分解因式X(2-X)+6(X-2)=(X-2)(6-X)
X(2-X)+6(X-2)
=-X(X-2)+6(X-2)
=(X-2)(6-X)
5.(X^2+Y^2)2-4 X^2 Y^2
=(X^2+Y^2+2XY)(X^2+Y^2-2XY)
=(X+Y)^2(X-Y)^2
6.9a^2-6ab+3a
=3a(3a-2b+1)
收起
1.
15M^3N^2+5M^2N-20M^2N^3
5(3M^3N^2+M^2N-4M^2N^3)
5M^2(3MN^2+N-4N^3)
5M^2N(3MN+1-4N^2)
所以公因式是5M^2N
2.
(P-Q)^2-(Q-P)^3=(Q-P)^2*E
(Q-P)^2-(Q-P)^3=(Q-P)^2*E
(Q-P)^2-(...
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1.
15M^3N^2+5M^2N-20M^2N^3
5(3M^3N^2+M^2N-4M^2N^3)
5M^2(3MN^2+N-4N^3)
5M^2N(3MN+1-4N^2)
所以公因式是5M^2N
2.
(P-Q)^2-(Q-P)^3=(Q-P)^2*E
(Q-P)^2-(Q-P)^3=(Q-P)^2*E
(Q-P)^2-(Q-P)^3-(Q-P)^2*E=0
(Q-P)^2[1-(Q-P)-E]=0
(Q-P)^2(1-Q+P-E)=0
1-Q+P-E=0
E=1-Q+P
所以E是1-Q+P
3.
24M^2N+18N
=6(4M^2N+3N)
=6N(4M^2+3)
所以公因式是6N
4.
X(2-X)+6(X-2)
=-X(X-2)+6(X-2)
=(X-2)(-X+6)
=-(X-2)(X-6)
5.
(X^2+Y^2)^2-4X^2Y^2
=(X^2+Y^2)^2-(2XY)^2
=[(X^2+Y^2)-(2XY)][(X^2+Y^2)+(2XY)]
=(X^2+Y^2-2XY)(X^2+Y^2+2XY)
=(X-Y)^2(X+Y)^2
6.
9a^2-6ab+3a
=3(3a^2-2ab+a)
=3a(3a-2b+1)
收起