①2/3根号3又3/4乘以-9根号45= ②24根号x^2y÷根号3x=
问题描述:
①2/3根号3又3/4乘以-9根号45= ②24根号x^2y÷根号3x=
答
①2/3根号3又3/4乘以(-9根号45)
=1/3根号15×(-27根号5)
=-9根号75
=-45根号3
②24根号x^2y÷根号3x
=24/根号3*根号xy
=8根号3xy