2x^2+5x+3=(2x+3)(x+1)
2m^2-m-3=(2m-3)(m+1)
10y^2-y-3=(2y+1)(5y-3)
7-19x-6x^2=(7+2x)(1-3x)
-3x^2+5x+2=-(3x+1)(x-2)
1-2x-48x^2=(1-8x)(1+6x)
-9s^2+30s-25 =-(3s-5)^2
因式分解 2x^2+5x+32m^2-m-310y^2-y-37-19x-6x^224m^2+m-8-3x^2+5x+2
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