1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).
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)2a3b+8a2b2+8ab3(2)x3y2-4x2y+4x(3)9(a+b)2+12(a+b)+4(4)4x2-12x+9
4樓:御妹
(1)2a3b+8a2b2+8ab3
=2ab(a2+4ab+4b2)
=2ab(a+2b)2;
(2)x3y2-4x2y+4x
=x(x2y2-4xy+4)
=x(xy-2)2;
(3)9(a+b)2+12(a+b)+4
=[3(a+b)+2]2
=(3a+3b+2)2;
(4)4x2-12x+9=(2x-3)2.
5.把下列各式分解因式: (1)a2-14ab+49b2 (2)a(x+y)-(a-b)(x+y); (3)121x2-144y2; (4)3x
5樓:匿名使用者
解:(1)a2-14ab+49b2
=a2-2×7ab+(dao7b)2
=(專a-7b)2
(2)a(x+y)-(a-b)(屬x+y)=(x+y)(a-a+b)
=b(x+y);
(3)121x2-144y2;
=(11x)2-(12y)2
=(11x+12y)(11x-12y)
(4)3x4-12x2
=3x2(x2-4)
=3x2(x+2)(x-2)
6樓:匿名使用者
5.把下列各式分解因式:
(1)a2-14ab+49b2
=a²-2×a×7b+(7b﹚²
=(a-7b)²
(內2)a(x+y)-(a-b)(
容x+y)
=(x+y)[a-(a-b)]
=b(x+y)
(3)121x2-144y2
=(11x)²-(12y)²
=(11x+12y)(11x-12y)
(4)3x4-12x2
=3x²﹙x²-4)
=3x²(x+2)(x-2)
7樓:璇曉井
1(a-7b)2 (平方) 2 b(x+y) 3 ( 11x+12y)(11x-12y) 4 3x4-3x4x2=3x4x(1-2)=-3x4=-12
把下列各式分解因式(1)12a3b2-9a2b+3ab;(2)9x2-4y2;(3)x2(x-y)+(y-x);(4)(x-1)2+10(x-
8樓:神馬
(1)12a3b2-9a2b+3ab=3ab(du4a2b-3a+1);
zhi(2)9x2-4y2=(3x+2y)(dao3x-2y);
(3)x2(x-y)+(y-x)
=(x2-1)(x-y)
=(x-y)(x+1)(x-1);
(4)(x-1)2+10(x-1)+25
=(x-1+5)2
=(x-4)2.
把下列各式分解因式1mxynyx
1 m x y n baiy x dum n zhix y dao2 2x4 32 2 回x4 16 2 x2 2 42 2 x2 4 答x2 4 2 x2 4 x 2 x 2 3 a3 a a a2 1 a a 1 a 1 4 x y 2 2 x y 1 x y 1 2 5 11 x x 1 x ...
把下列各式分解因式14a2bc8ab32b
zhi1 4a2bc 8ab 32b2 4b daoa2c 2a 8b 版 2 x a b 權b c y b a b c x a b b c y a b b c a b b c x y 3 x4 81,x2 9 x2 9 x2 9 x 3 x 3 4 a 4 ab b2 a 2 b 2 5 2x3 ...
把下列各式因式分解 (1)ax2 16ay2(2) 2a
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 ...