(7-✓2)(7+√2)= ?
- 45
- 47
- 49
- 51
Explanation
(7 - √2)(7 + √2):
Use the formula (a - b)(a + b) = a² - b²
Here, a = 7 and b = √2
So,
= 7² - (√2)²
= 49 - 2
= 47
Related MCQs
- 20
- 19
- 18
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 220
- 240
- 260
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 14 days
- 10 days
- 20 days
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- Factor
- HCF
- LCM
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- Always a prime number
- Always a perfect square
- Always even
- Always divisible by 3
اس سوال کو وضاحت کے ساتھ پڑھیں
Leave a Reply
Your email address will not be published. Required fields are marked *
