katelynnikole16 katelynnikole16
  • 01-09-2017
  • Mathematics
contestada

 
student says that if 5x2 = 20, then x must be equal to 2. Do you agree or disagree with the student? Justify your answer.

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irayhan2020padi97 irayhan2020padi97
  • 09-07-2018
 I disagree. If each side of the equation is divided by 5, the result is x2 = 4. By the square root property of equality, x = -2 or x = 2. So x could be -2 instead of 2.
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saabbelqis saabbelqis
  • 27-10-2020

Answer:

I disagree. If each side of the equation is divided by 5, the result is x2 = 4. By the square root property of equality, x = -2 or x = 2. So x could be -2 instead of 2.

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