若x^2+3x-2=0,则x^3+5x^2+4x+18等于
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若x^2+3x-2=0,则x^3+5x^2+4x+18等于若x^2+3x-2=0,则x^3+5x^2+4x+18等于若x^2+3x-2=0,则x^3+5x^2+4x+18等于x^2+3x-2=0x^2
若x^2+3x-2=0,则x^3+5x^2+4x+18等于
若x^2+3x-2=0,则x^3+5x^2+4x+18等于
若x^2+3x-2=0,则x^3+5x^2+4x+18等于
x^2+3x-2=0
x^2+3x=2
x^3+5x^2+4x+18
=x^3+3x^2+2x^2+4x+18
=x(x^2+3x)+2x^2+4x+18
=2x+2x^2+4x+18
=2x^2+6x+18
=2(x^2+3x)+18
=2*2+18
=4+18
=22
x^3+5x^2+4x+18
=x(x^2+3x-2)+2x^2+6x-4+22
=22
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
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