题目内容
把下列各式因式分解:
(1)x2+x+
;
(2)8a-4a2-4;
(3)(a2+9)2-36a2:
(4)a2-2ab+b2-c2:
(5)16x4-72x2+81:
(6)9(a-b)2+12(a2-b2)+4(a+b)2.
(1)x2+x+
1 |
4 |
(2)8a-4a2-4;
(3)(a2+9)2-36a2:
(4)a2-2ab+b2-c2:
(5)16x4-72x2+81:
(6)9(a-b)2+12(a2-b2)+4(a+b)2.
(1)原式=(x+
)2;
(2)原式=-4(a2-2a+1)
=-4(a-1)2;
(3)原式=(a2+9+6a)(a2+9-6a)
=(a+3)2(a-3)2;
(4)原式=(a-b)2-c2
=(a-b+c)(a-b+c);
(5)原式=(4x-9)2;
(6)原式=[(3(a-b)+2(a+b)]2
=(5a-b)2.
1 |
2 |
(2)原式=-4(a2-2a+1)
=-4(a-1)2;
(3)原式=(a2+9+6a)(a2+9-6a)
=(a+3)2(a-3)2;
(4)原式=(a-b)2-c2
=(a-b+c)(a-b+c);
(5)原式=(4x-9)2;
(6)原式=[(3(a-b)+2(a+b)]2
=(5a-b)2.
练习册系列答案
相关题目