x²-5x+6；x²-5x-6；x²+5x-6；x²+3x-18；x²-2x-15；a²+7a+10a²b²-7ab+10；x²+4x+3；y²-7y+12；m²+7m-18；p²-5p-36；a²+3ab+2b²；x²-5xy-6y²；2p²-3p+1；m²+2mn

x²-5x+6；x²-5x-6；x²+5x-6；x²+3x-18；x²-2x-15；a²+7a+10a²b²-7ab+10；x²+4x+3；y²-7y+12；m²+7m-18；p²-5p-36；a²+3ab+2b²；x²-5xy-6y²；2p²-3p+1；m²+2mn
x²-5x+6；x²-5x-6；x²+5x-6；x²+3x-18；x²-2x-15；a²+7a+10
a²b²-7ab+10；x²+4x+3；y²-7y+12；m²+7m-18；p²-5p-36；a²+3ab+2b²；x²-5xy-6y²；2p²-3p+1；m²+2mn-3n²；a²-9ab+20b²；3m²+4m+1；x³y-3x²y²+2xy³；-x的4次方+3x³+28x²；（x²-3x）²-（3x+7）²；（x+y）²+8（x+y）-48

x²-5x+6；x²-5x-6；x²+5x-6；x²+3x-18；x²-2x-15；a²+7a+10a²b²-7ab+10；x²+4x+3；y²-7y+12；m²+7m-18；p²-5p-36；a²+3ab+2b²；x²-5xy-6y²；2p²-3p+1；m²+2mn
x²-5x+6；=(x-2)(x-3)
x²-5x-6；=(x-6)(x+1)
x²+5x-6；=(x+6)(x-1)
x²+3x-18；=(x+6)(x-3)
x²-2x-15；=(x-5)(x+3)
a²+7a+10,=(a+2)(a+5)
a²b²-7ab+10；=(ab-2)(ab-5)
x²+4x+3；=(x+3)(x+1)
y²-7y+12；=(y-3)(y-4)
m²+7m-18；=(m+9)(m-2)
p²-5p-36；=(p-9)(p+4_
a²+3ab+2b²；=(a+2b)(a+b)
x²-5xy-6y²；=(x-6y)(x+y)
2p²-3p+1；=(2p-1)(p-1)
m²+2mn-3n²；=(m+3n)(m-n)
a²-9ab+20b²；=(a-4b)(a-5b)
3m²+4m+1；=(3m+1)(m+1)
x³y-3x²y²+2xy³；=xy(x²-3xy+2y²)=xy(x-2y)(x-y)
-x的4次方+3x³+28x²；=-x²(x²-3x-28)=-x²(x-7)(x+4)
（x²-3x）²-（3x+7）²；=(x²-3x+3x+7)(x²-3x-3x-7)=(x²+7)(x²-6x-7)=(x²+7)(x-7)(x+1)
（x+y）²+8（x+y）-48=(x+y+12)(x+y-4)