(-2x)²+(6x³-12x⁴)÷﹙3x²﹚

问题描述:

(-2x)²+(6x³-12x⁴)÷﹙3x²﹚

(-2x)²+2x-4x²=2x

(-2x)²+(6x³-12x⁴)÷﹙3x²﹚
=4x²+2x-4x²
=2x