SOLUTION: How do yu solve this by using quadratic formula 2 = 0.7n + 0.6n2? please show steps.

Question 149485: How do yu solve this by using quadratic formula 2 = 0.7n + 0.6n2?
please show steps.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given equation.

Multiply both sides by 10 to clear the decimals.

Distribute and multiply.

Subtract 20 from both sides.

Subtract 20 from both sides.

Let's use the quadratic formula to solve for n

Start with the quadratic formula

Plug in , , and

Square to get .

Multiply to get

Rewrite as

Add to to get

Multiply and to get .

Take the square root of to get .

or Break up the expression.

or Combine like terms.

or Simplify.

So the answers are or (which are approximately or )

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