The correct answer is D
Explanation
Roman Numeral Answer Format
Roman Numeral : Can the value of be ?
You could test this answer by substituting for in the equation and seeing whether the result is true. But you can also reason this question out without substituting numbers:
If= , then is a positive number, because any nonzero number squared is positive.
If = , then is negative.
So is negative and is positive.
Therefore, cannot be .
Mark Roman numeral with an “F” for false.
Roman Numeral : Can the value of be ?
This is a very easy substitution to make:
Roman numeral is true, so mark it with a “T” for true.
Roman Numeral : Can the value of be ?
Substitute for :
If =, then .
Also, .
Roman numeral is true, so mark it with a “T” for true.
Check the Answers:
You now know whether each of the Roman numeral statements is true or false:
is false.
is true.
is true.
Find the choice that says only and
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