5 sqrt 42x(4+4 sqrt 7x)

Question

multiplying radical expressions

Answer 1

??????????? "5 sqrt42x(" ??????????? . . . maebee that shood be 5*sqrt(42)*(..... ?????????? . . .

Answer 2

"Solution: Given 5 sqrt 42x(4+4 sqrt 7x)
=>5√42√x(4+4√7√x)
multiplying radical
=> 5*4√42√x+4*5√7√42√x√x
=>20√42√x +20*7√6 x
=>20√42√x+140√6 x"