Question

How do you simplify `(5sqrtx+2)(2sqrtx-1)`?

Answer 1

`(5sqrtx+2)(2sqrtx-1)=10x-sqrtx-2`

Explanation:

`(5sqrtx+2)(2sqrtx-1)`

= `5sqrtx×(2sqrtx-1)+2×(2sqrtx-1)`

Now as `sqrtx×sqrtx=x` above can be multiplied and expanded to appear as

`10x-5sqrtx+4sqrtx-2`

= `10x-sqrtx-2`