SOLUTION: Use the quadratic formula to solve the equation. Give both exact and approximate answers. 3m2 + 12m + 5 = 0

Question 201194: Use the quadratic formula to solve the equation. Give both exact and approximate answers.
3m2 + 12m + 5 = 0

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Notice that the quadratic is in the form of where , , and

Let's use the quadratic formula to solve for "m":

Start with the quadratic formula

Plug in , , and

Square to get .

Multiply to get

Subtract from to get

Multiply and to get .

Simplify the square root (note: If you need help with simplifying square roots, check out this solver)

or Break up the expression.

or Reduce.

So the solutions are or

which approximate to or

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