﹣2²×√8+3√2﹙3-2√2﹚

问题描述:

﹣2²×√8+3√2﹙3-2√2﹚

﹣2²×√8+3√2﹙3-2√2﹚
=-4×2×√2+9√2-6×2
=-8√2+9√2-12
=√2-12