作业帮化简：2x^2-3[2x-2(-x^2+2x-1)].
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/30 11:26:08
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化简：2x^2-3[2x-2(-x^2+2x-1)].
化简：2x^2-3[2x-2(-x^2+2x-1)].
化简：2x^2-3[2x-2(-x^2+2x-1)].
2x^2-3[2x-2(-x^2+2x-1)-4]
=2x^2-3[2x+2x^2-4x+2-4]
=2x^2-3[2x^2-2x-2]
=2x^2-6x^2+6x+6
=-4x^2+6x+6