根号32x³y(x≥0,y≥0 )根号8x³+4x²y(x≥0,2x+y≥0 )计算3根号5×2根号10根号4分之3×(-根号2又3分之2)×根号56
问题描述:
根号32x³y(x≥0,y≥0 )
根号8x³+4x²y(x≥0,2x+y≥0 )
计算
3根号5×2根号10
根号4分之3×(-根号2又3分之2)×根号56
答
根号32x³y(x≥0,y≥0 )=√[(4x)²×2xy]=4x√(2xy)根号8x³+4x²y(x≥0,2x+y≥0 )=√[(2x)²(2x+y)]=2x√(2x+y)计算3根号5×2根号10=6√50=30√2根号4分之3×(-根号2又3分之2)×根号56=-√...