SOLUTION: 7a2 + 8a + 2 = 0 I have done most of the problems and this is the last one can you help me please....

Question 172163: 7a2 + 8a + 2 = 0 I have done most of the problems and this is the last one can you help me please....
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Notice we have a quadratic equation in the form of where , , and

Let's use the quadratic formula to solve for a

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 answers are or

which approximate to or

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