Question

帮忙做几道根式乘除题/是除号,X是乘号√18 / √84√15 / 2√5化简:√4X49 / √2X7(X是乘号)√3

Answer 1

√18 / √8

=√(18/8)

=√(9/4)

=3/2

4√15 / 2√5

=(4/2)X√(15/5)

=2√3

化简:

√4X49 / √2X7

=√[(4X49)/(2X7)]

=√(2X7)

=√14

√300 / √60

=√(300/60)

=√50

=√(25*2)

=5√2

√27 X √50 / √6

=√(27X50/6)

=√(9X25)

=3X5

=15

计算:

√0.4 X √3.6

=√(0.4X3.6)

=√(4X0.36)

=2X0.6

=1.2