Illustrating Quadratic Equations

Which of the following equations is NOT a quadratic equation?

• 2x² + 2 = 0

• x² + 4x = -4

• 64 = x²

• x² - 2x + 1

In the quadratic equation $3x^2+\ 5x\ =\ 9$ , what is the value of a?

• 0

• 3

• 5

• 9

Which of the following is NOT a quadratic equation?

• $2x^2\ +\ 9x\ \ge\ 10$

• $x^2\ -\ 4\ =\ 0$

• $x^2\ =\ 2$

•  $\left(x+6\right)\left(x-3\right)=0$  

In the quadratic equation  $2x^2\ =\ 49$  , what is the value of b?

• 0

• 1

• 2

• 3

The standard form of  $-x^2+2=3x$  is $-x^2+3x+2=0$  . 

• True

• False