若x2+3x-2=0,则2x3+6x2-4x的值为_.
问题描述:
若x2+3x-2=0,则2x3+6x2-4x的值为______.
答
∵x2+3x-2=0,
∴x2+3x=2,
∴2x3+6x2-4x
=2x(x2+3x-2)
=2x(2-2)
=0,
故答案为:0.