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Solving Quadratic Equations

Solve the quadratic equation –5x² – 20x = 0 by using the Quadratic Formula. Write

your answers in Exact Form and in Approximate Form (Rounded to three decimal

places as needed). Note that in some cases, the Exact Form and the Approximate

Form may be the same.

Let x₁ =

x1 =

x1 =

-b-√b² - 4ac

2a

Note: If only one solution exists, x₂ will equal DNE

-5x² – 20x = 0

4

and x₂ =

Exact Form

4

Approximate Form

X

-b+√b² - 4ac

2a

X

x2 =

x2 =

=

-10

Exact Form

-10

Approximate Form

X

X