SOLUTION: I think this is quadratic equation...Please help. Thank you Y^2-4y+4=36 What is the exact solution What is the approximate solution

Question 176363: I think this is quadratic equation...Please help. Thank you
Y^2-4y+4=36
What is the exact solution
What is the approximate solution
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Subtract 36 from both sides.

Combine like terms.

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

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

Note: the exact solutions and the approximate solutions are the same (since no approximation is not needed).
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