Question

(3sqrt(5)+sqrt(3))*(sqrt(3)-4sqrt(5))

Answer 1

(3√5+√3)(√3-4√5) =
=3√5*√3 + √3*√3 -3√5*4√5 -√3*4√5=
=3√15 +3 -12*5 -4√15=
=-√15+3-60=
=-√15 - 57