If 5x+9 + 5x-9 = 3(2 + √2), then find the value of 10x+9?
Explanation:
Given, 5x+9 + 5x-9 = 6 + 3√2
⇒ 5x+9 + 5x-9 = √36 + √18
∴ 5x+9= √36 and 5x-9= √18
⇒ 5x + 9 = 36 and 5x - 9 = 18
⇒ 5x = 27
⇒ 10x = 54
⇒ 10x + 9 = 63
⇒ 10x+9 = √63
⇒ 10x+9 = 3√7
Hence, option (a).
» Your doubt will be displayed only after approval.
Help us build a Free and Comprehensive Preparation portal for various competitive exams by providing us your valuable feedback about Apti4All and how it can be improved.