Question

simplifique as expressões e calcule as somas algébricas
e) 5√28-3√20-2√63+2√45=

Answer 1

5√28 - 3√20 - 2√63 + 2√45
5√(4*7) - 3√(4*5) - 2√(9*7) + 2√(9*5)
10√7 - 6√5 - 6√7 + 6√5 = 4√7