Solve by Quadratic Formula Practice Problems Online

What is the root of the quadratic equation

$x^2 + 6 x +9 = 0?$

What are the roots of the quadratic equation

$x^2 -2 x -48 = 0?$

What are the roots of the quadratic equation

$x^2 - 2 x -5 = 0?$

x=1 + 2\sqrt{6} \text{ or } x=1 - 2\sqrt{6}

x=-1\text{ or } x= 5

x=1 + \sqrt{6} \text{ or } x=1 - \sqrt{6}

x=2 + 2\sqrt{6}\text{ or } x=2 - 2\sqrt{6}

From the top of a building of 960 feet, Tommy threw a coin upwards. The height of the coin from the ground $t$ seconds after it has been thrown is given by

$h = - 16t^2 + 8 t + 960.$

How long (in seconds) would it take the coin to hit the ground?

What are the roots of the quadratic equation

$0.5x^2 + 0.6 x -0.2 = 0?$

x=\frac{3}{5}\pm\frac{\sqrt{19}}{5}

x=\frac{3}{5}\pm\frac{\sqrt{46}}{10}

x=-\frac{3}{5}\pm\frac{\sqrt{19}}{5}

x=-\frac{3}{5}\pm\frac{\sqrt{46}}{10}

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Quadratic Equations

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