将下列各式因式分解: (1)4a2 y2 -16a2 x2 ; (2)2a2 x-2ax+1/2x; (3)3x(x−y)3 -6y(y−x)2 ; (4)1/4(a+b)2 +(a+b)+1.
问题描述:
将下列各式因式分解:
(1)4
a
2
-16
y
2
a
2
;
x
2
(2)2
x-2ax+
a
2
x;1 2
(3)3x(x−y
-6y(y−x
)
3
;
)
2
(4)
(a+b1 4
+(a+b)+1.
)
2
答
(1)4
a
2
-16
y
2
a
2
=4a2(y2-4x2)=4a2(y+2x)(y-2x);
x
2
(2)2
x-2ax+
a
2
x=2x(a2-a+1 2
)=2x(a-1 4
)2;1 2
(3)3x(x−y
-6y(y−x
)
3
=3(x-y)2[x(x-y)-2y]=3(x-y)2(x2-xy-2y);
)
2
(4)
(a+b1 4
+(a+b)+1=[
)
2
(a+b)+1]2=(1 2
a+1 2
b+1)2.1 2