please solve question 9
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x=2m+1
y=2n+1
x^2+y^2
=4m2+4m+1+4n2+4n+1
=2(2m2+2n2+2m+2n+1)
=2q
so it's divisible by 2..it's even
but not divisible by 4
y=2n+1
x^2+y^2
=4m2+4m+1+4n2+4n+1
=2(2m2+2n2+2m+2n+1)
=2q
so it's divisible by 2..it's even
but not divisible by 4
aishwary88:
more explanation
please
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