l+b= 41 , l×b=400 then l=?, b=?
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Answered by
2
Answer:
l=25
b=16
Step-by-step explanation:
l + b = 41↔(1)
(l+b)² = l² + b² + 2lb
41² = l² + b² + 800
1681 - 800 = l² + b²
881 = l² + b²
(l-b)² = l² + b² - 2lb
(l-b)² = 881 - 800
(l-b)² = 81
(l-b) = 9↔(2)
(1) + (2)
2l = 50
l = 25
Substitute l in (1)
b = 16
Answered by
3
Answer:
l and b can be 25 and 16 or 16 and 25 respectively.
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