Question Video: Evaluating a Square Root Mathematics • Second Year of Secondary School

Video Transcript

Evaluate the square root of four.

We can start by recalling that when we have a root symbol and no smaller digit, we’re really taking the square root of a value. When we’re finding the square root of four, we’re really asking, what number multiplied by itself would give us four? We could think of this with any letter. Here, I’ve used 𝑦. So, 𝑦 times 𝑦 equals four. So, 𝑦 must be equal to two since two multiplied by two will give us four. So, we can give our answer that the square root of four is two.