SOLUTION: Hello. I'm checking to see if I did this problem correctly using the quadratic formula y^2

SOLUTION: Hello. I'm checking to see if I did this problem correctly using the quadratic formula y^2 - 18y = -81 thanks!

Question 190115: Hello.
I'm checking to see if I did this problem correctly using the quadratic formula
y^2 - 18y = -81
thanks!
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Add 81 to 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

Negate to get .

Square to get .

Multiply to get

Subtract from 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 answer is
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