Question

Is 0.2 a root of the equation x²–0.4=0? Justify

Answer 1

Answer: NO

Step-by-step explanation:

x² - 0.4 = 0

x² = 0.4

x² = 4/10

x = √(4/10)

x = 2/√10

x = √10/5

0.2 is not the root of the equation x² - 0.4 = 0

Note : (0.2 is the root of 0.04)

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Answer 2

Answer:

0.2 is a root so x=0.2

Step-by-step explanation:

(0.2)²-0.4=0

0.04-0.4=0

-0.36 is not equal to 0

Therefore 0.2 IS NOT A ROOT