If a+b=13 and a-b=3 , then find the value of
Created: 5 years ago |
Updated: 3 years ago
best des
(a2 + b2) = 1/2 {(a + b)2 + (a - b)2}
= 1/2 {(13)2 + (3)2}
= 1/2 (169 + 9)
= 1/2 * 178
= 89
Md Azizur Rahman
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