Câu 1:

Cho $\left(x-7\right).7=0$. Chọn đáp án đúng:

Câu 2:

Cho $\left(-5-x\right).\left(-5\right)=0$. Chọn đáp án đúng

Câu 3:

Cho $\left(1-x\right).\left(-6\right)=0$. Chọn đáp án đúng:

Câu 4:

Cho $\left(x+16\right).\left(-26\right)=0$. Chọn đáp án đúng:

Câu 5:

Cho $19.\left(x-6\right)=0$. Chọn đáp án đúng:

Câu 6:

Cho $\left|-21\right|.\left(x-32\right)=0$. Chọn đáp án đúng

Câu 7:

Tính:

a, $\left(x-7\right).\left(x+8\right)=0$

b, $\left(x-19\right).\left(x+21\right)=0$

Câu 8:

Tính:

$$\begin{gathered} a, \left(x-12\right).\left(x+456\right)=0 \\ b, \left(x-312\right).\left(x+45\right)=0 \end{gathered}$$

Câu 9:

Tính $$\begin{gathered} a, -75.\left(x-654\right).\left(x+35\right)=0 \\ b, 563.\left(x-496\right).\left(x+412\right)=0 \end{gathered}$$

Câu 10:

Tính:

$$\begin{gathered} a, -13.\left(x-645\right).\left(x+613\right)=0 \\ b, 651.\left(x-12\right).\left(x+946\right)=0 \end{gathered}$$

Câu 11:

Tính:

$$\begin{gathered} a, \left|-x-35\right|.\left|x+623\right|=0 \\ b, \left|-x-56\right|.\left|x+965\right|=0 \end{gathered}$$

Câu 12:

Tính:

$$\begin{gathered} a, -\left(-56\right).\left|-x-61\right|.\left|x+132\right|=0 \\ b, -\left|-96\right|.\left|-x-856\right|.\left|x+965\right|=0 \end{gathered}$$

Câu 13:

Tính:

$$\begin{gathered} a, -\left(-23\right).\left|-x-265\right|.\left|x+948\right|=0 \\ b, -\left|-98\right|.\left|-x-641\right|.\left|x+431\right|=0 \end{gathered}$$

Câu 14:

Tính$$\begin{gathered} a, \left(x-541\right).\left(x+865\right).\left(x-6523\right)=0 \\ b, \left(x+6845\right).\left(x-6543\right).\left(x+6541\right)=0 \end{gathered}$$

Câu 15:

Tính: $$\begin{gathered} a, \left(x-4233\right).\left(x+8465\right).\left(x-9864\right)=0 \\ b, \left(x+5641\right).\left(x-3210\right).\left(x+2184\right)=0 \end{gathered}$$

Câu 16:

Tính:

$$\begin{gathered} a, -551.\left|-x-642\right|.\left(x+4563\right).\left|x-6431\right|=0 \\ b, -\left|-465\right|.\left|x-4132\right|.\left(-x+4523\right).\left|-x-6212\right|=0 \end{gathered}$$

Câu 17:

Tính:

$$\begin{gathered} a, -64.\left|-x-6532\right|.\left(x+8965\right).\left|x-8520\right|=00 \\ b, -\left|-321\right|.\left|x-7984\right|.\left(-x+465\right).\left|-x-645\right|=0 \end{gathered}$$