2x²-7x+3=（2x-1)(x-3)
3x²-13x+10=（3x-10)(x-1)
3x²-13x-10=((3x+2)(x-5)
6x²-7x-5=(2x+1)(x-5)
5x²+6xy-8y²=(5x-4y)(x+2y)
6x²-11xy+3y²=(x-3y)(x-y)
x的四次方+6x²-7=(x²+7)(x²-1)=(x²+7)(x+1)(x-1)
3m²n²-2mn-1=(3mn+1)(mn-1)
x²+3x-10=(x+5)(x-2)
a²+4a-21=(a+7)(a-3)
m²+4m-12=(m+6)(m-2)
x²+2x-15=(x+5)(x-3)
y²-3y-18=(y-6)(y+3)
2x²-x-1=(2x+1)(x-1)
6x²+7x+2=(2x+1)(3x+2)
6y²-11y-10=(3y+2)(2y-5)
6x²+x-15=(2x-3)(3x+5)
3a²-8a+4=(a-2)(3a-2)
5x²+7x-6=(5x-3)(x+2)
5+7m-6m²=(5-3m)(1+2m)
2x²+15x+7=(2x+1）（x+7)
2y²+y-6=(2y-3)(y+2)
3a²-7a-6=(3a+2)(a-3)
6x²-13x+6=(3x-2)(2x-3)
4n²+4n-15=(2n+5)(2n-3)
x²y²-7xy+10=(xy-2)（xy-5)
x的4次方-10x²+9=(x²-9)(x²-1)=(x+1)(x-1)(x+3)(x-3)
5a²-41ab+8b²=(5a-b)(a-8b)
x²+9x-70=(x+14)(x-5)
x²-25+150=(x-100（x-15)
x²-25x-150²=
x²-52x+100=(x-50)(x-2)
x²-5x-1050=(x-35)(x+30)
y²-34y-800=(y-50)(y+16)
x²-155x+750=(x-150)(x-5)
x²-75x+1350=(x-45)(x-30)
6x²-65x+50=(6x-5)(x-10)
25x²+75x-16=(5x-1)(5x+16)
400x²+600x-31=(20x-1)(20x+31)
x的4次方-8x²y²-9y的4次方=(x²-9y²)(x²+y²)=(x+3y)(x-3y)(x²+y²)