SOLUTION: how do you use the quadratic formula to solve 5y^2+5y=9? please round to the nearest hundreth

Question 171872: how do you use the quadratic formula to solve 5y^2+5y=9? please round to the nearest hundreth
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Subtract 9 from both sides.

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

Let's use the quadratic formula to solve for y

Start with the quadratic formula

Plug in , , and

Square to get .

Multiply to get

Rewrite as

Add to to get

Multiply and to get .

or Break up the expression.

So the answers are or

which approximate to or

So to the nearest hundredth, the answers are or

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