Q. If (64)² - (36)²= 20 * x, then what is the value of x?
✅ Correct Answer: (B)
140
Explanation: Here, we can apply the formula of
a^2 - b^2 = (a + b) (a - b)
So, after applying the formula, we will get
(64 + 36) (64 - 36) = 20 * x
100 * 28 = 20 * x
x = 100 * 28/ 20 = 140
Explanation by: Ravi Chauhan
Here, we can apply the formula of
a^2 - b^2 = (a + b) (a - b)
So, after applying the formula, we will get
(64 + 36) (64 - 36) = 20 * x
100 * 28 = 20 * x
x = 100 * 28/ 20 = 140
a^2 - b^2 = (a + b) (a - b)
So, after applying the formula, we will get
(64 + 36) (64 - 36) = 20 * x
100 * 28 = 20 * x
x = 100 * 28/ 20 = 140