-4√(28x) times √(7x^3)

Question

`-4√(28x)` times
`√(7x^3)`

Answer 1

`{56x}^(2)`

Explanation:

`- 4 √(28x) * \sqrt{ {7x}^(3) }`

`= -4 * 2 √(7x) * √(7x)`

`= - 4 * 2 * 7x * x`

`= {56x}^(2)`