Question

Evaluate (7.5^)2-(2.5^)2 please do this fast as possible please????

Answer 1

Given : (7.5)^2 - (2.5)^2

It is in the form of a^2 - b^2. Here, a = 7.5 and b = 2.5.

We know that a^2 - b^2 = (a + b)(a - b)

⇒ (7.5 + 2.5)(7.5 - 2.5)

⇒ (10)(5)

⇒ 50.

Hope it helps!