Question

VALENDO 20 PONTOS
efetue
2√27 - 5 √12;
√12 + √75 + √108;
4√63 - √7;
√50 + √18 - √8
me ajudem

Answer 1

2 \/¨¨27  -  5 \/¨¨12
2 \/¨¨3² .3  -  5 \/¨¨2² . 3
2. 3 \/¨3  - 5 . 2 \/¨¨3
6 \/¨¨3 - 10 \/¨¨3 = \/3(6 - 10)=-4 \/¨¨3

\/¨¨12 + \/¨75 + \/¨108 = 
\/¨¨2² . 3    + \/¨3.5²   +   \/¨¨3.5.7
2 \/¨3   +  5 \/¨¨3   +  \/3.\/5.\/7
7 \/¨¨3 + \/3.5.7  
4 \/¨63 - \/7
4 \/¨3² .7  -  \/7
4.3 \/7   -   \/7
12 \/7  -  \/7=\/¨¨7(12 -1)=11\/7

\/¨¨50  +  \/¨18 - \/¨¨8
\/¨2.5²  +  \/¨2.3²   -   \/¨¨2².2

5\/¨2    +    3\/¨¨2    -   2\/¨¨¨2
8\/¨¨2  -  2 \/¨¨2
6\/¨¨2