Question 292562
{{{(sqrt(7a) + sqrt(b))^2 = (sqrt(7a) + sqrt(b))(sqrt(7a) + sqrt(b)) = sqrt(7a)*sqrt(7a)+sqrt(7a)*sqrt(b)+sqrt(b)*sqrt(7a)+sqrt(b)*sqrt(b) = 7a+2*sqrt(7ab)+b = 7a+b+2*sqrt(7ab)}}}



So {{{(sqrt(7a) + sqrt(b))^2 = 7a+b+2*sqrt(7ab)}}}