The value of (31)² - (29)² = _____?
- 100
- 120
- 110
- None of these
Explanation
Using the identity a² - b² = (a+b)(a-b):
(31)² - (29)² = (31+29)(31-29)
= (60)(2)
= 120
Related MCQs
- 8y + 5
- 3x + 8y + 3
- 3x + 8y + 5
- None of these
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