Respuesta :

So, the questions is 4b * (√7b)^2

= 4b * (√7b) * (√7b)

= 4b * (7b)

= 28b^2

Hope this helps.

If you have any questions, please put them in the comment section below.
limacharliesierra
Square root to the power of 2 will disappear, so:

-> 4b x (sqroot (7b))^2

= 4b x 7b
= 28b^2