a student says that if 5x2 = 20, then x must be equal to 2. do you agree or disagree with the student? justify your answer.
2 answers:
To check if the student is correct, we are going to solve the equation step by step.
Step 1 divide both sides of the equation by 5:
Step 2 take square root to both sides of the equation:
or
The equation has tow solutions, and .
I disagree with the student because is just one solution and not the only one; is also a valid solution of the equation.
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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Answer:
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Step-by-step explanation
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Answer:
C
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