Question

is 0.2 a root of the equation x²–0.4? plz help me to solve it​

Answer 1

Answer:

${x}^{2} - 0.4 = 0 \\ \\ {x}^{2} = 0.4 \\ \\ x = \sqrt{0.4} \\ \\ x = \sqrt{0.4}$

Answer 2

Step-by-step explanation:

p(x) = x²-0.4

p(0.2) = (0.2)²-0.4

p(0.2) = 0.04-0.4

p(0.2 = -0.36

Answer - No, 0.2 is not a root of the equation x²-0.4