因式分解(81a^2+16b^2-72a^2b^2
问题描述:
因式分解(81a^2+16b^2-72a^2b^2
答
81a^2+16b^2-72a^2b^2
=(9a-4b)^2
因式分解(81a^2+16b^2-72a^2b^2
81a^2+16b^2-72a^2b^2
=(9a-4b)^2