I have a 2 algebra sums I can not figure out ...

√2 * b * b = 1256 How can the answer be 105.1

And a other one: l = 1,5 * b | bring the 1.5 to the left gives b = 1 / 1.5 * l , how??

th g

and

How can the answer be b = 105.1?

How can the answer be b = 105.1?

Thank you for your help ...