21 . If m + n = 4, find the least value of m2 + n2.
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Answered by
2
Answer:
Answer is 8.It is the least value
Answered by
0
Answer:
the least value is zero
Step-by-step explanation:
BC = m2—n2, then AB = 2mn, then AD = DE = mn and mn+49 = (m2—n2)/2 or (m—n)2--2n2 = 98. The minimum solution of this Diophantine equation is m—n = 10, n = 1, m = 11. ... Therefore a = 0, 9, 18, etc.; the least value is zero.
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