Question

what are the positive and negative square roots of 8,100?

Explanation:

Step1: Recall square - root definition

If \(x^{2}=a\), then \(x = \pm\sqrt{a}\). We need to find \(x\) such that \(x^{2}=8100\).

Step2: Calculate the square - root

We know that \(90\times90 = 8100\) and \((- 90)\times(-90)=8100\). So \(\sqrt{8100}=90\) and \(-\sqrt{8100}=-90\).

Answer:

90, - 90