The value of (18.43 × 18.43 - 6.57 × 6.57) / 11.86 is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 25.
⇒ (18.43 × 18.43 - 6.57 × 6.57) / 11.86
We know that,
⇒ a2 - b2 = (a + b)(a - b)
⇒ (18.432 - 6.572) / 11.86
⇒ ((18.43 + 6.57)(18.43 - 6.47)) / 11.86
⇒ (25 × 11.86) / 11.86
⇒ 25