4x = 52, x² - 5² = ?

4x = 52, x² - 5² = ?

A 81

B 9

C 144

D 12

Solution

Correct Answer: Option C

দেয়া আছে, 4x = 52
∴ x = 52/4 = 13

অতএব, x² – 5²
= 13² - 5²
= 169 – 25
= 144