`\sqrt{14-6\sqrt{5}}`
`=\sqrt{9-2.3.\sqrt{5}+5}`
`=\sqrt{(3-\sqrt{5})^2}`
`=|3-\sqrt{5}|`
`=3-\sqrt{5}`
Đáp án+Giải thích các bước giải:
Choose the best answer.
I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.
We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.