Cho phương trình: $x^2-4x+m+1=0$ ( $m$ là tham số ). Tìm $m$ để phương trình có 2 nghiệm $x_1,x_2$ thoả mãn: $x_{1}^2+x_{2}^2-4x_1x_2=22$

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.