x³-4x²+x+6因式分解x的三次方减4x的二次方加x加6
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x³-4x²+x+6因式分解x的三次方减4x的二次方加x加6
x³-4x²+x+6因式分解
x的三次方减4x的二次方加x加6
x³-4x²+x+6因式分解x的三次方减4x的二次方加x加6
x³-4x²+x+6
=x³-3x²-x²+x+6
=(x³-3x²)-(x²-x-6)
=x²(x-3)-(x-3)(x+2)
=(x-3)(x²-x-2)
=(x-3)(x-2)(x+1)
原式=x(x²-4x+4)-3(x-2)
=x(x-2)²-3(x-2)
=(x-2)(x²-2x-3)
=(x-2)(x-3)(x+1)
x³-4x²+x+6
=x(x²-4x+1)+6
=x(x²-4x+4-3)+6
=x(x-2)²-(3x-6)
=x(x-2)²-3(x-2)
=(x-2)(x²-2x-3)
=(x-2)(x-3)(x+1)
(2x²+2)(½x-2)+10 ....是这个么?从初中毕业就没碰过这个,好几年了,连什么叫因式分解都忘了。