think wrote:Give the exact and approximate solutions to three decimal places
This is probably most-simply solved by taking square roots
. For instance:. . . . .. . . . .. . . . .
The above would be the "exact" solution. The "approximate" solution would be found by plugging each of:. . . . .
...into your calculator, and rounding the outputs to the required three decimal places.
Note: In this particular case, the "exact" solution won't involve square roots. For the "approximate" solutions, you'll have to tack on three (entirely unnecessary) zeroes after the decimal point.