急!因式分解几道题目,x²+xy-6y² (x²+x)²—8(x²+x)+12 12x²-5x-2还有2题2ax-10ay+5by-bxx三次方减3x²+4
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![急!因式分解几道题目,x²+xy-6y² (x²+x)²—8(x²+x)+12 12x²-5x-2还有2题2ax-10ay+5by-bxx三次方减3x²+4](/uploads/image/z/613575-63-5.jpg?t=%E6%80%A5%21%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E5%87%A0%E9%81%93%E9%A2%98%E7%9B%AE%2Cx%26%23178%3B%EF%BC%8Bxy-6y%26%23178%3B+%EF%BC%88x%26%23178%3B%EF%BC%8Bx%EF%BC%89%26%23178%3B%E2%80%948%EF%BC%88x%26%23178%3B%EF%BC%8Bx%EF%BC%89%EF%BC%8B12+12x%26%23178%3B-5x-2%E8%BF%98%E6%9C%892%E9%A2%982ax-10ay%EF%BC%8B5by-bxx%E4%B8%89%E6%AC%A1%E6%96%B9%E5%87%8F3x%26%23178%3B%EF%BC%8B4)
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急!因式分解几道题目,x²+xy-6y² (x²+x)²—8(x²+x)+12 12x²-5x-2还有2题2ax-10ay+5by-bxx三次方减3x²+4
急!因式分解几道题目,x²+xy-6y² (x²+x)²—8(x²+x)+12 12x²-5x-2
还有2题
2ax-10ay+5by-bx
x三次方减3x²+4
急!因式分解几道题目,x²+xy-6y² (x²+x)²—8(x²+x)+12 12x²-5x-2还有2题2ax-10ay+5by-bxx三次方减3x²+4
(1)x²+xy-6y²
=(x²-2xy)+(3xy-6y²)
=x(x-2y)+3y(x-2y)
=(x-2y)(x+3y)
(2)(x²+x)²-8(x²+x)+12
=[(x²+x)-2(x²+x)]-[6(x²+x)-12]
=(x²+x)(x²+x-2)-6(x²+x-2)
=(x²+x-2)(x²+x-6)
=(x-1)(x+2)(x-2)(x+3)
(3)12x²-5x-2
=(12x²+3x)-(8x+2)
=3x(4x+1)-2(4x+1)
=(4x+1)(3x-2)
(4)2ax-10ay+5by-bx
=2a(x-5y)-b(x-5y)
=(x-5y)(2a-b)
(5)x³-3x²+4
=(x³+x²)-(4x²+4x)+(4x+4)
=x²(x+1)-4x(x+1)+4(x+1)
=(x+1)(x²-4x+4)
=(x+1)(x-2)².