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    Im stuck on 7a and b with no idea how to do them [attach]698808
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    You have a² + b² + c² = 13² you need to find out how many different number combinations make this true, with the numbers being a whole number(integer).
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    Is there any efficient way to do this or should I just trial and error?
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    you could reduce the options a bit by considering odd/even restrictions :dontknow:
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    https://en.m.wikipedia.org/wiki/Pythagorean_quadruple
    Go to the parameterisation, start producing values for n,m,q
 
 
 
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Updated: October 26, 2017
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