Advanced MathEasySquaring a substituted expression
Advanced Math practice question
If y = 2x, which of the following is equivalent to y² in terms of x?
- A. 4x²Correct
- B. 2x²
- C. 4x
- D. 2x
Answer: A. 4x²
(2x)² = 4x².
Why the other answers are wrong
- B. 2x²
- The 2 must be squared as well.
- C. 4x
- x must be squared as well.
- D. 2x
- Nothing has been squared.
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