SOLUTION: Give exact and approximate solutions to three decimal places (x+9)^2 = 20?

Question 525873: Give exact and approximate solutions to three decimal places (x+9)^2 = 20?

Found 2 solutions by Tatiana_Stebko, jim_thompson5910:
Answer by Tatiana_Stebko(1539) (Show Source): You can put this solution on YOUR website!

, or
, the exact solutions
, the approximate solutions to three decimal places
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Take the square root of both sides.

or Break up the "plus/minus" to form two equations.

or Simplify the square root.

or Subtract from both sides.

--------------------------------------

Answer:

So the exact solutions are or .

which approximate to or

Note: use a calculator to find the approximations
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