Question

Calcule o valor das expressões:
A) (2√27x2√12)x√5=
B) (2√18+5√72-3√50):(7√2)=

Answer 1

a) 2\/(9x3) x 2\/(4x3) x \/5 = 
2.3\/3 x 2.2\/3 x \/5 = 
6\/3 x 4\/3 x \/5 = 
24.\/(3x3x5) = 
24.\/(9x5) = 
24.3\/5 = 
72\/5

b) 2\/(9x2) + 5\/(36x2) - 3\/(25x2) : 7\/2 = 
2.3\/2 + 5.6\/2 - 3.5\/2 : 7\/2 = 
\/2.(6+30-15) : 7\/2 = 
(36-15):7 = 
21:7 = 3