Question

A=3\(\sqrt{49}\)-\(\sqrt{25}\)  ;  B=\(\sqrt{\left(3-2\sqrt{5}\right)^2}-\sqrt{20}\)

Mik cần gấp nha mn

Answer 1

`A = 3 . 7 - 5`

`= 16`

`B = |2 sqrt 5 - 3| - sqrt 20`

`= sqrt 20 - sqrt 20 - 3`

`= -3`

Answer 2

\(A=3.7-5\\ =21-5\\ =16\\ B=\left|3-2\sqrt{5}\right|-2\sqrt{5}\\ =2\sqrt{5}-3-2\sqrt{5}\\ =-3\)

Answer 3

`A=3.7-5=16`

`B=2sqrt(5) -3 -sqrt(20)`

`B=sqrt(20) -sqrt(20) -3=-3`

Answer 4

A=3.7−5=21−5=16

B=∣∣3−2√5∣∣−2√5=2√5−3−2√5=−3