Multiple choice

Say true or false. $0.2$ a root of the equation $x^2- 0.4 = 0$.

  1. True

  2. False

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

If x = 0.2, then x^2 = 0.04. The equation is x^2 - 0.4 = 0, so 0.04 - 0.4 = -0.36, which is not 0. Therefore, 0.2 is not a root.

AI explanation

Substitute x equals 0.2 into the equation x squared minus 0.4 equals 0. This gives 0.2 squared minus 0.4, which equals 0.04 minus 0.4, resulting in negative 0.36. Since the result is not zero, 0.2 is not a root of the equation, making the statement false.