因式分解好的进来(急要!!!有重谢)
来源:百度知道 编辑:UC知道 时间:2024/06/29 01:57:32
1)-19xy+7y^2+12x^2
2)(x+y)^2+2(x+y)-15
要有过程!!!
采纳有重谢!!!
3a^2b^2+ab-2
a^6+7a^3-8
2)(x+y)^2+2(x+y)-15
要有过程!!!
采纳有重谢!!!
3a^2b^2+ab-2
a^6+7a^3-8
1)-19xy+7y^2+12x^2
=(x-y)(12-7y)
2)(x+y)^2+2(x+y)-15
=(x+y+5)(x+y-3)
1,=7y^2-19xy+12x^2
=(12x-7y)(x-y)
2,=(x+y+5)(x+y-3)
3,=(3ab-2)(ab+1)
4,=(a^3+8)(a^3-1)
=(a+2)(a^2-2a+4)(a-1)(a^2+a+1)
1)
=12x^2-19xy+7y^2
=(12x-7y)(x-y)
2)
=(x+y-3)(x+y+5)
交叉相乘法,可得:
(1)(12x-7y)(x-y)
(2)(x+y+5)(x+y-3)