化简:x(x²—1)+2x²(x+1)—3x(2x—5)

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化简:x(x²—1)+2x²(x+1)—3x(2x—5)
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化简:x(x²—1)+2x²(x+1)—3x(2x—5)
化简:x(x²—1)+2x²(x+1)—3x(2x—5)

化简:x(x²—1)+2x²(x+1)—3x(2x—5)
原式=x³-x+2x³+2x²-6x²+15x
=3x³-4x²+14x

x(x²—1)+2x²(x+1)—3x(2x—5)=
x³-x+2x³+2x²-6x²+15x=
3x³-4x²+14x

x(x²—1)+2x²(x+1)—3x(2x—5)
=x[(x^2-1)+2x(x+1)-3(2x-5)]
=x(x^2-1+2x^2+2x-6x+15)
=x(3x^2-4x+14)
=3x^3-4x^2+14x

原式=x^3-x+2x^3+2x-6x^2+15x
=x^3-6x^2+16x
=x(x^2-6x+16)
=x(x-8)(x+2)

x(x²—1)+2x²(x+1)—3x(2x—5)
=x³-x+2x³+2x²-6x²+15x
=3x³-4x²+14x
=x(3x²-4x+14)

原式= x3-x + 2x3 +2x2 - 6x2 +15x

= x3 +2x3 +2x2 - 6x2 -x + 15x

= 3x3 -4x2 + 14x

原式=x³-x+2x³+2x²-6x²+15x
=3x³-4x²+14x

=x³-x+2x³+2x²-6x²+15x
=3x³-4x²+14x

x(x²—1)+2x²(x+1)—3x(2x—5)=
x³-x+2x³+2x²-6x²+15x=
3x³-4x²+14x

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