2)Efetue as multiplicações e divisões: a) √2 . √7 =
b) 3√5 . 3√10 =
c) 4√6 . 4√2 =
d) √15 . √2 =
e) 3√7 . 3√4 =
f) √15 : √3 =
g) 3√20 : 3√2 =
h) 4√15 : 4√5 =
i) √40 : √8 =
j) 3√30 : 3√10 =

preciso disso hoje mesmo

b

step-by-step explanation:

b

d

step-by-step explanation:

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.