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Question

(123×123×123 + 130×130×130)/(123×123 - 123×130 + 130×130) = ?

A 253 Correct Answer Incorrect Answer
B 275 Correct Answer Incorrect Answer
C 230 Correct Answer Incorrect Answer
D 244 Correct Answer Incorrect Answer

Solution

let a = 123, b = 130 so (123×123×123+130×130×130)/(123×123-123×130+130×130) = (a3 + b3)/(a2 - ab + b2) => ((a+b) x (a2+ b2- ab))/( a 2+ b 2- ab ) = (a+b) => 123 + 130 = 253 ` ` ` `

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