Vishwanath
Monday, February 18, 2013
19. | If a - b = 3 and a2 + b2 = 29, find the value of ab. |
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Answer: Option A
Explanation:
2ab = (a2 + b2) - (a - b)2
= 29 - 9 = 20
ab = 10.
Title : Simplification Q19
Description : 19. If a - b = 3 and a 2 + b 2 = 29, find the value of ab. A. 10 B. 12 C. 15 D. 18 Answer: Option A Explanation: 2 ab = ( a 2...
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