Question

(17)² – (13)² is equal to ______.

विकल्प

• 80

• 90

• 100

• 120

Answer 1

(17)² – (13)² is equal to 120.

Explanation:

We can use the difference of squares formula:

a² – b² = (a – b)(a + b)

Here, a = 17 and b = 13

So, (17)² – (13)² 

= (17 – 13)(17 + 13) 

= (4)(30)

= 120