College Math CLEP Prep Practice Exam

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Which of the following equations has a degree of two?

y=x+2
y=2x+2
y=x^2+2x+2
y=2x^2+4x+4

The correct answer is: y=x^2+2x+2

An equation's degree is determined by the highest power of its variable. In this case, the variable is x. Option A only has x to the power of 1, making its degree 1. Option B also has a degree of 1 since its highest power of x is still 1. Option D, on the other hand, has a degree of 2 since its highest power of x is 2. Therefore, the correct answer is not A, B, or D.