Question 1065011
{{{sqrt(28)+sqrt(63)+sqrt(7)=sqrt(4*7)+sqrt(9*7)+sqrt(7)=sqrt(4)*sqrt(7)+sqrt(9)*sqrt(7)+sqrt(7)=2*sqrt(7)+3*sqrt(7)+sqrt(7)=(2+3+1)*sqrt(7)=highlight(6sqrt(7))=sqrt(36)*sqrt(7)=sqrt(36*7)=highlight(sqrt(252))}}}