Question

$\sqrt{14.44}+\sqrt{9+x^2}=8.8$ ആയാൽ x കണ്ടെത്തുക.

• A. 2
• B. 4
• C. 5
• D. 7

Answer 1

Answer:

B. 4

$\sqrt{14.44}+\sqrt{9+x^2}=8.8$

$\implies3.8+\sqrt{9+x^2}=8.8$

$\sqrt{9+x^2}=8.8 - 3.8= 5$

$\text{If we take the square of both sides}$

$\sqrt{9+x^2}^2=5^2$

$\implies9+x^2=25$

$\implies x^2=25-9=16$

$x=4$