x²+3x-1=0,则x³+5x²+5x-18=?
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x²+3x-1=0,则x³+5x²+5x-18=?
x²+3x-1=0,则x³+5x²+5x-18=?
x²+3x-1=0,则x³+5x²+5x-18=?
x³+5x²+5x-18
=x(x²+3x-1)+2x²+6x-18
=x(x²+3x-1)+2(x²+3x-1)-16
=0+0-16
=-16