Practicing Success
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If a3 - b3 = 2349, a - b = 9, then find the value of (a + b)2 - ab. |
196 250 261 274 |
261 |
Formula → a3 - b3 = (a - b) (a2 + b2 + ab) 2349 = 9 (a2 + b2 + ab) we can write a2 - b2 + ab as ⇒ (a + b)2 - ab So, (a + b)2 - ab = \(\frac{2349}{9}\) = 261 |
