How can this equation not be true?  TOPIC_SOLVED

Simplificatation, evaluation, linear equations, linear graphs, linear inequalities, basic word problems, etc.

How can this equation not be true?  TOPIC_SOLVED

Postby mamanana on Sun Jul 12, 2009 9:38 pm

This equation is causing a headache. How can I solve it when it has two equal signs in it?

sqrt (x ^ 2 - 49) = sqrt (x ^ 2 - 49) = sqrt (x-7)

Never mind I just saw the folly of my ways. Just from typing this out it helped.
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Postby stapel_eliz on Sun Jul 12, 2009 10:23 pm

mamanana wrote:This equation is causing a headache. How can I solve it when it has two equal signs in it?

sqrt (x ^ 2 - 49) = sqrt (x ^ 2 - 49) = sqrt (x-7)

I don't know what the point of the first square root and "equals" sign is, because it's just repeated information. :confused:

Solve the equation created by the second and third radicals only. :D
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