2016 · Q98
The value of the expression ((243+647)²+(243-647)²)/(243 × 243 + 647 × 647) is equal to
Elementary MathematicsNumber System
- A0
- B1
- C2
- D3
Explanation
Expanding: ((a+b)²+(a−b)²) = 2(a²+b²). Dividing by (a²+b²) gives 2. With a = 243, b = 647 the value is 2, option C.