1樓:手機使用者
(1)x5-x
=x(x4-1)
=x(x2+1)(
x2-1)
x(x2+1)(x+1)(x-1);
(2)a2(x-1)+b2(1-x)
=a2(x-1)-b2(x-1)
(x-1)(a2-b2)
=(x-1)(a+b)(a-b);
(3)(a-b)2+18(a-b)+81
=[(a-b)+9]2=(a-b+9)2;
(4)(x2+2x)2+2x2+4x+1
=(x2+2x)2+2(x2+2x)+1
=[(x2+2x)+1]2
=(x2+2x+1)2
=[(x+1)2]2
=(x+1)4
把下列各式因式分解:(1)ax2-16ay2(2)-2a3+12a2-18a(3)a2-2ab+b2-1(4)a2(x-y)-4b2(x-y)(5)
2樓:小米米米小米米
(1)ax2-16ay2=a(x+4y)(
duzhix-4y);(dao
專2)-2a3+12a2-18a=-2a(屬a2-6a+9)=-2a (a-3)2;(3)a2-2ab+b2-1=(a-b)2-1=(a-b+1)(a-b-1);(4)a2(x-y)-4b2(x-y)=(x-y)(a2-4b2)=(x-y) (a+2b)(a-2b);(5)(x+2)(x-6)+16=x2-4x+4=(x-2)2.
3樓:科比ai打鐵
(zhi1)ax2-16ay2=a(daox+4y)(內容x-4y);
(2)-2a3+12a2-18a
=-2a(a2-6a+9)
=-2a (a-3)2;
(3)a2-2ab+b2-1
=(a-b)2-1
=(a-b+1)(a-b-1);
(4)a2(x-y)-4b2(x-y)
=(x-y)(a2-4b2)
=(x-y) (a+2b)(a-2b);
(5)(x+2)(x-6)+16=x2-4x+4=(x-2)2.
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
4樓:匿名使用者
(1)a2(x-y)2+2a(x-y)3+(x-y)4,=(x-y)2[a2+2a(x-y)+(x-y)2,=(x-y)2(a+x-y)2;
(2)(x2+y2)2-4x2y2,
=(x2+2xy+y2)(x2-2xy+y2),=(x+y)2(x-y)2.
把下列各式分解因式.(1)9a2-14b2(3)12a2?ab+12b2(3)a2-2ab-4+b2(4)x(x2+1)2-4x3(5)x2-7x-8
5樓:匿名使用者
(1)9a2-1
4b2=(3a+1
2b)(3a-1
2b);
(3)12a
?ab+12b
=12(a2-2ab+b2)=1
2(a-b)2;
(3)a2-2ab-4+b2=(a-b)2-4=(a-b+2)(a-b-2);
(4)x(x2+1)2-4x3=x[(x2+1)2-4x2]=x(x2+1+2x)(x2+1-2x)=x(x+1)2(x-1)2;
(5)x2-7x-8=(x-8)(x+1);
(6)x(x-y)2+y(y-x)=(x-y)[x(x-y)-y]=(x-y)(x2-xy-y).
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