分解下列因式(可不用详细过程）x²+3x+2 x²-7x+6 x²-4x-21 x²+2x-15-x²-4x-21 -m²-7m+18 p²-5pq-36q² s²t²-2s²t-8s²3x²+11x+10 2x²-7x+3 6x²-7x-5 5x²+6xy-8y²5a&#

分解下列因式(可不用详细过程）x²+3x+2 x²-7x+6 x²-4x-21 x²+2x-15-x²-4x-21 -m²-7m+18 p²-5pq-36q² s²t²-2s²t-8s²3x²+11x+10 2x²-7x+3 6x²-7x-5 5x²+6xy-8y²5a&#
分解下列因式(可不用详细过程）
x²+3x+2 x²-7x+6 x²-4x-21 x²+2x-15
-x²-4x-21 -m²-7m+18 p²-5pq-36q² s²t²-2s²t-8s²
3x²+11x+10 2x²-7x+3 6x²-7x-5 5x²+6xy-8y²
5a²b²+23ab-10 2a²b²-17abxy+10x²y² x^4 +6x²+8 (a-b)²-4(a+b)+3

分解下列因式(可不用详细过程）x²+3x+2 x²-7x+6 x²-4x-21 x²+2x-15-x²-4x-21 -m²-7m+18 p²-5pq-36q² s²t²-2s²t-8s²3x²+11x+10 2x²-7x+3 6x²-7x-5 5x²+6xy-8y²5a&#

(x+1)(x+2)

-(x-3)(x+7)

(3x+5)(x+2)

(5ab+2)(ab-5)

(x-1)(x-6)

-(m+9)(m-2)

(2x-1)(x-3)

x^2+3x+2=(x+1)(x+2); x^-7x+6=(x-1)(x-6)
x^2-4x-21=(x+3)(x-7) x^2+2x-15=(x+5)(x-3)
-x^2-4x-21=-(x^2+4x+21) -m^2-7m+18=-(m+9)(m-2)
p^2-5pq-36q^2=(p-9q)(p+4q) s^2t^2-2s^2t-8s^2=s^2(t-...

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x^2+3x+2=(x+1)(x+2); x^-7x+6=(x-1)(x-6)
x^2-4x-21=(x+3)(x-7) x^2+2x-15=(x+5)(x-3)
-x^2-4x-21=-(x^2+4x+21) -m^2-7m+18=-(m+9)(m-2)
p^2-5pq-36q^2=(p-9q)(p+4q) s^2t^2-2s^2t-8s^2=s^2(t-4)(t+2)
5a^2b^2+23ab-10=(5ab-2)(ab+5)
x^4+6x^2+8=(x^2+2)(x^2+4)
(a-b)^2-4(a-b)+3=(a-b-1)(a-b-3)

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