a)x²√(9x²)=x².3x=3x³, x≥0
b)-5b²√(4/b²)=-5b².(-2/b)=10b, b∠0
(√(a²)=/a/=a, a≥0, √(a²)=/a/=-a, a≤0)
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a)x²√(9x²)=x².3x=3x³, x≥0
b)-5b²√(4/b²)=-5b².(-2/b)=10b, b∠0
(√(a²)=/a/=a, a≥0, √(a²)=/a/=-a, a≤0)