2b根号b分之a+3/a根号a立方b-(4a根号a分之b+根号9ab)
问题描述:
2b根号b分之a+3/a根号a立方b-(4a根号a分之b+根号9ab)
答
2b根号b分之a+3/a根号a立方b-(4a根号a分之b+根号9ab)
=2b*1/b√ab+3/a*a*√ab-4a*1/a*√ab-3√ab
=2√ab+3√ab-4√ab-3√ab
=-2√ab