2nd Quiz Math 9

Solve the equation by using quadratic formula.

 $2x^2\ +3\ =\ -7x$  
Simplify your answer.

•  $\frac{7\pm\sqrt{73}}{4}$  

•  $\frac{-7\pm\sqrt{73}}{4}$  

•  $\frac{7\pm\sqrt{-73}}{4}$  

• none of the above

Solve the equation by using quadratic formula.

 $9n^2\ =\ 4\ +7n$  

Simplify your answer.

•  $7\pm\sqrt{\frac{193}{18}}$  

•  $\frac{7\pm\sqrt{193}}{18}$  

•  $\frac{7\pm\sqrt{193}}{-18}$  

• none of the above

Use discriminant formula to determine whether each quadratic equation has TWO REAL ROOTS, ONE REAL ROOT, or TWO IMAGINARY ROOTS.

 $f\left(x\right)\ =25x^2\ -20x\ +\ 4$  

Use UPPERCASE characters only.

Use discriminant formula to determine whether each quadratic equation has TWO REAL ROOTS, ONE REAL ROOT, or TWO IMAGINARY ROOTS.

 $f\left(x\right)\ =\ x^2\ +4x\ +7$  
Use UPPERCASE character only.

Use discriminant formula to determine whether each quadratic equation has TWO REAL ROOTS, ONE REAL ROOT, or TWO IMAGINARY ROOTS.

 $f\left(x\right)\ =\ 3x^2\ +5x\ -2\$  
Use UPPERCASE character only.

Use discriminant formula to determine whether each quadratic equation has TWO REAL ROOTS, ONE REAL ROOT, or TWO IMAGINARY ROOTS.

 $f\left(x\right)\ =\ x^2\ -8x\ +3\$  
Use UPPERCASE characters only.

Use discriminant formula to determine whether each quadratic equation has TWO REAL ROOTS, ONE REAL ROOT, or TWO IMAGINARY ROOTS.

 $f\left(x\right)\ =\ 9x^2\ -\ 4\$  

Use UPPERCASE character only.

Use discriminant formula to determine whether each quadratic equation has TWO REAL ROOTS, ONE REAL ROOT, or TWO IMAGINARY ROOTS.

 $f\left(x\right)\ =\ 4x^2\ -12x\ +9$  

Use UPPERCASE character only.

Use discriminant formula to determine whether each quadratic equation has TWO REAL ROOTS, ONE REAL ROOT, or TWO IMAGINARY ROOTS.

 $f\left(x\right)\ =\ 3x^2\ =\ 6x$  

Use UPPERCASE character only.

Use discriminant formula to determine whether each quadratic equation has TWO REAL ROOTS, ONE REAL ROOT, or TWO IMAGINARY ROOTS.

 $f\left(x\right)\ =\ \frac{1}{2}x^2\ +\ 4x\ +\ 2$  

Use UPPERCASE characters only.