2.7^2*1.8^2-1.2*1.2^2

问题描述:

2.7^2*1.8^2-1.2*1.2^2
因式分解

2.7²×1.8²-1.2×1.2²=(9×0.3)²×(9×0.2)²-30×0.2²×(4×0.3)²=9²×9²×0.3²×0.2²-30×4²×0.3²×0.2²=(9²×9²-30×4...