分解因式①16x2y2-1②-25x2+49y2③a5-9a3④3(a+b)2-27c2⑤-x4+x2y2⑥a
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/09/25 08:36:20
分解因式
①16x2y2-1
②-25x2+49y2
③a5-9a3
④3(a+b)2-27c2
⑤-x4+x2y2
⑥a
①16x2y2-1
②-25x2+49y2
③a5-9a3
④3(a+b)2-27c2
⑤-x4+x2y2
⑥a
①原式=(4xy+1)(4xy-1);
②原式=-(5x+7y)(5x-7y)
③原式=a3(a2-9)
=a3(a+3)(a-3)
④原式=3[(a+b)2-9c2]
=3(a+b+3c)(a+b-3c);
⑤原式=-x2(x2-y2)=-x2(x+y)(x-y);
⑥原式=(a+
1
5b)(a-
1
5b);
⑦原式=m2(x-y)-n2(x-y)
=(x-y)(m2-n2)
=(x-y)(m+n)(m-n)
⑧原式=[4(x+y)+5(x-y)][4(x+y)-5(x-y)]
=-(x-9y)(9x-y).
②原式=-(5x+7y)(5x-7y)
③原式=a3(a2-9)
=a3(a+3)(a-3)
④原式=3[(a+b)2-9c2]
=3(a+b+3c)(a+b-3c);
⑤原式=-x2(x2-y2)=-x2(x+y)(x-y);
⑥原式=(a+
1
5b)(a-
1
5b);
⑦原式=m2(x-y)-n2(x-y)
=(x-y)(m2-n2)
=(x-y)(m+n)(m-n)
⑧原式=[4(x+y)+5(x-y)][4(x+y)-5(x-y)]
=-(x-9y)(9x-y).
分解因式:①x2y2-5x2y-6x2 ②(p2+q2)2-4p2q2③(a-b)4-3(a-b)2-10 &
分解因式:(1)x2(a-b)+4(b-a);(2)x2(2x+y)2-4x2y2.
把下列各式分解因式:(1)a2(x-y)2+2a(x-y)3+(x-y)4(2)(x2+y2)2-4x2y2.
分解因式:16x4-72x2y2+81y4.
化简求值(2X2-2y2)-3(X2y2+X2)+3(X2y2+y2),其中X=-1,y=2
分解因式①3a3-18a2+27a②x2+4xy+4y2-2x-4y-3
已知x2+4y2+x2y2-6xy+1=0,求 x4-y4/2x-y 乘 2xy-y2/xy-y2 除以(x2+y2/x
对R3中任意向量a=(x1,x2,x3)T,b=(y1,y2,y3)T,定义(a,b)=x1y1+2x2y2+3x3y3
计算(1)(a-b+c-d)(c-a-d-b);(2)(x+2y)(x-2y)(x4-8x2y2+16y4).
分解因式下:X4-2X2-8 X2-3XY+2Y2 2X2-7X+3 X2+2X-15-AX-5A 解方程:1999X2
多项式2x2y2-2y2+(xy-1)(x-1)2因式分解后还有的因式是
y2+x2=2x,则x2y2的范围?