যদি (a - b) = 3 এবং a2 + b2 = 29 হয় তাহলে ab এর মান কত ?
Created: 7 months ago |
Updated: 6 months ago
best des
Let, a2 + b2 = 29
a2 + b2 = (a-b)2 + 2ab
=> 29 = 32 + 2ab
=> 29 - 9 = 2ab
=> 20 = 2ab
=> ab = 20/2
;. ab = 10
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