Prove that p, q and r must be perfect squares. Ok so the rule for a square is: So then therefore if you square it which goes to Where did I go wrong?
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I think you went wrong in your first step. If you substitute into you get: and not what you wrote Another thing is that it doest equal , where you multiply out the brackets.
Originally Posted by Mukilab Ok so the rule for a square is: Where did you get this? If you plug in , the right hand side yields instead of . From context it's clear that you mean . Then it's a matter of proving that if p, q and r are not all perfect squares, then s cannot be rational.
That's the formula for proving the square of a number using the previous number squared.
I don't know if it's a matter of whether p, q and r are perfect squares or not. Never mind, this question does not apply to me anymore and I have far more tricky questions to get around :P
Originally Posted by Mukilab That's the formula for proving the square of a number using the previous number squared. Well just for reference,
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