Is 0.2 a root of the equation x 2 - 0.4 = 0? Justify your answer.

Question

Philoid · Accepted Answer

No, 0.2 is not a root of the equation x² - 0.4 = 0.

If we substitute the value 0.2 in place of x in the equation, x² - 0.4 = 0

⇒ (0.2)² - 0.4 ≠ 0

Is 0.2 a root of the equation x2 - 0.4 = 0? Justify your answer.