Question

What can be general formula to find square of any number?

(a) (a±b)^2

(b) a^2

(c) a

(d) b

I got this question during an interview.

My question comes from Finding the Square of a Number in chapter Squares and Square Roots of Mathematics – Class 8

Answer 1

Right choice is (a) (a±b)^2

Easiest explanation: The general formula of finding square of any number is (a±b)^2. Option a^2 cannot be correct because if we need to find square of number such as 23 the method using the general formula (a±b)^2 would be more easier. Hence the correct option is (a±b)^2.