mysonisaplant mysonisaplant

13-06-2020
Mathematics

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Astudent says that if 5x^2=20 then x must be equal to 2. Do you agree or disagree with the student? Justify your answer

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wegnerkolmp2741o wegnerkolmp2741o

13-06-2020

Answer:

disagree, x= 2 or -2

Step-by-step explanation:

5x^2 = 20

Divide each side by 5

5x^2/5 = 20/5

x^2 = 4

Take the square root of each side

sqrt(x^2) = ±sqrt(4)

x = ±2

X could be either 2 or -2

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