Give exact & approx. solns (to 3 dec. places) for (x+8)^2=1

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think
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Give exact & approx. solns (to 3 dec. places) for (x+8)^2=1

Postby think » Mon Mar 23, 2009 12:30 am

Give the exact and approximate solutions to three decimal places
(x+8)^2=1

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stapel_eliz
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Postby stapel_eliz » Mon Mar 23, 2009 3:22 pm

think wrote:Give the exact and approximate solutions to three decimal places
(x+8)^2=1

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. :roll:


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