二次项系数不为一的十字相乘法
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二次项系数不为一的十字相乘法
6X^2-27X+12=
-2x^2+3X+2=
0.15A^2-8.5A-30=
15X^2+14XY-8Y^2=
9A^2B^2-6ABC^2-8C^2=
2(X+Y)^2+3(X+Y)-20=
6X^2-27X+12=
-2x^2+3X+2=
0.15A^2-8.5A-30=
15X^2+14XY-8Y^2=
9A^2B^2-6ABC^2-8C^2=
2(X+Y)^2+3(X+Y)-20=
![二次项系数不为一的十字相乘法](/uploads/image/z/16198901-53-1.jpg?t=%E4%BA%8C%E6%AC%A1%E9%A1%B9%E7%B3%BB%E6%95%B0%E4%B8%8D%E4%B8%BA%E4%B8%80%E7%9A%84%E5%8D%81%E5%AD%97%E7%9B%B8%E4%B9%98%E6%B3%95)
6X^2-27X+12=3(2x-1)(x-4)
-2x^2+3X+2= -(x-2)(2x+1)
0.15A^2-8.5A-30=0.05(A-60)(3A+10)
15X^2+14XY-8Y^2=(3X+4Y)(5X-2Y)
9A^2B^2-6ABC-8C^2=(3AB-4C)(3AB+2C)
2(X+Y)^2+3(X+Y)-20=(X+Y+4)(2X+2Y-5)
-2x^2+3X+2= -(x-2)(2x+1)
0.15A^2-8.5A-30=0.05(A-60)(3A+10)
15X^2+14XY-8Y^2=(3X+4Y)(5X-2Y)
9A^2B^2-6ABC-8C^2=(3AB-4C)(3AB+2C)
2(X+Y)^2+3(X+Y)-20=(X+Y+4)(2X+2Y-5)