因式分解,务必要划到最简.最好有过程.没有也随便.(7a^2+2b^2)^2-(2b^2+7b^2)^2(a^2+b^2+c^2)^2-4a^2b^2(x+1)(x+2)(x+3)(x+4)-1203x^2+4y^2+3z^2+8xy-8zy-10xzx^2+2(a+b)x-(3a^2-10ab+3b^2)6x^2+7xy+2y^2-8x-5y+26x^2-15y^2-6z^2-xy5xz+21yzx^3+9x^

Question

因式分解,务必要划到最简.最好有过程.没有也随便.
(7a^2+2b^2)^2-(2b^2+7b^2)^2
(a^2+b^2+c^2)^2-4a^2b^2
(x+1)(x+2)(x+3)(x+4)-120
3x^2+4y^2+3z^2+8xy-8zy-10xz
x^2+2(a+b)x-(3a^2-10ab+3b^2)
6x^2+7xy+2y^2-8x-5y+2
6x^2-15y^2-6z^2-xy5xz+21yz
x^3+9x^2+26x+24
a^3+b^3+c^3-3abc
x^5+x+1
bc(b+c)+ca(c-a)-ab(a+b)
(b-c)^3+(c-a)^3+(a-b)^3
8x^3-(x-y)^3-(x+y)^3
x^3+(2a+1)x^2+(a^2+2a-1)x+a^2-1
a^2(b+c)+b^2(c+a)+c^2(a+b)-a^3-b^3-c^3-2abc
做几道算几道,务必按照次序.
谢.只给三天时间,

Answer 1

第一题好像打错了,后半部应是(2a^2+7b^2)^21原式=45(a^2-b^2)=45(a+b)(a-b)如果没错,原式=7(7a^2+11b^2)(a+b)(a-b)2原式=a^4+b^4+c^4-2a^2b^2+2a^2c^2+2b^2c^2==[(a+b)^2+c^2][(a-b)^2+c^2]3原式=（x^2+5x+6）(x^2+5...