计算;3(ab-5b²+2a²)-(7ab+16a²-25b²).
问题描述:
计算;3(ab-5b²+2a²)-(7ab+16a²-25b²).
答
3(ab-5b²+2a²)-(7ab+16a²-25b²)=10b²-10a²-4ab
计算;3(ab-5b²+2a²)-(7ab+16a²-25b²).
3(ab-5b²+2a²)-(7ab+16a²-25b²)=10b²-10a²-4ab