Solving quadratic equations Quiz

1. Solve $x^2-3x-10=0$.

• A. $x=5$ or $x=-2$
• B. $x=-5$ or $x=2$
• C. $x=10$ or $x=-1$
• D. $x=3$ or $x=-10$

2. Solve $x^2-4x=0$.

• A. $x=4$ only
• B. $x=0$ or $x=-4$
• C. $x=0$ or $x=4$
• D. $x=2$

3. How many solutions does $2x^2-3x+5=0$ have?

• A. Two
• B. None
• C. One
• D. It cannot be told without solving

4. Solve $x^2+4x+1=0$ using the formula.

• A. $x=-2\pm\sqrt5$
• B. $x=2\pm\sqrt3$
• C. $x=-4\pm\sqrt{12}$
• D. $x=-2\pm\sqrt3$

5. A rectangle with length $(x+2)$ cm and width $x$ cm has area $24$ cm$^2$. Find $x$.

• A. $-6$ cm
• B. $22$ cm
• C. $4$ cm
• D. $4$ cm or $-6$ cm