(√5+√3)²-√60=5+2*√(5*3)+3-√60=8+2*√15-√60=8+√(2²*15)-√60=
=8+√(4*15)-√60= 8+√60-√60=8.
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(√5+√3)²-√60=5+2*√(5*3)+3-√60=8+2*√15-√60=8+√(2²*15)-√60=
=8+√(4*15)-√60= 8+√60-√60=8.