Question

what are the positive and negative square roots of 4,900?

Explanation:

Step1: Recall square - root definition

If \(x^{2}=a\), then \(x = \pm\sqrt{a}\). We need to find \(x\) such that \(x^{2}=4900\).

Step2: Calculate square - root

We know that \(70\times70 = 4900\) and \((- 70)\times(-70)=4900\). So \(\sqrt{4900}=70\) and \(-\sqrt{4900}=-70\).

Answer:

70, -70