It's 4 onlyimage.png 9.65 KB

The upper part has plus in between

Will not get integer value in this case then

Algebra am having probs understanding squares and square roots rules in solving algebra equation like cancelling out in division where this addition in the denominator and multiplication in  nominator when can we can cancel out and when can we not cancel out. Equation 2into 4 squares upon 2 into 4 gives me answer 4 as well as 8.