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ElenaW [278]
3 years ago
9

Find two consecutive whole numbers such that the sum of their squares is 221.

Mathematics
1 answer:
Law Incorporation [45]3 years ago
7 0
n^2+(n+1)^2=2n^2+2n+1=221
2n^2+2n=220
n^2+n=110
n^2+n-110=0
(n-10)(n+11)=0\implies n=10,n=-11

But since n must be a whole number, we ignore n=-11. So the two integers are n=10 and n+1=11.
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