Xác định `m` để pt sau có các nghiệm thỏa mãn một hệ thức đã cho : `1) x^2 + mx - 16` `x_1 = -4x_2` `2) mx^2 + 2(m - 4).x + m + 7 = 0` `x_1 - 2x_2 = 0`

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.

Choose the best answer.

We should decorate our living room with _____ orange banner. We also need ________  ribbons, balloons, party hats and costume.

Choose the best answer.

I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.