(2a根号3ab²)-(b/6根号27a³)-(6ab根号a/3)(b≥0)

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(2a根号3ab²)-(b/6根号27a³)-(6ab根号a/3)(b≥0)
x){(قO'&)ө O7H'$,afID}cHΥ@MR>/;ai`1P*b@ `cl҂[ao" C~qAba

(2a根号3ab²)-(b/6根号27a³)-(6ab根号a/3)(b≥0)
(2a根号3ab²)-(b/6根号27a³)-(6ab根号a/3)(b≥0)

(2a根号3ab²)-(b/6根号27a³)-(6ab根号a/3)(b≥0)
2a根号(3ab²)-(b/6)根号(27a³)- 6ab根号(a/3)
=2根号3*ab根号a - (1/2)*ab根号a - 2根号3*ab根号a
=- (1/2)*ab根号a