a) (√3/2)(-4√2) = -2√6
b) 3√7 (-2√7) 6√7 = (-2)*3*6*(√7*7*7) = -36*7√7 = -252√7
d) =(-7/3)√5 * (2/7)√5 = -2/3 * 5 = -10/3
e) 1,(6) = (16-1)/9 = 15/9 = 5/3
(5/3)√5 * (-3*2√5) = -5*2*√25 = -5*2*5 = -50
