5003 Praxis Practice Test Practice Question
What is the value of x^2-3x when x = 5?
Correct Answer: C
Rationale: To find the value of \( x^2 - 3x \) when \( x = 5 \), substitute 5 into the expression:
\[
5^2 - 3(5) = 25 - 15 = 10.
\]
Thus, the value is 10, which corresponds to option C.
Option A (2) results from incorrect calculations, possibly miscalculating the subtraction. Option B (5) may arise from mistakenly simplifying the expression without fully evaluating it. Option D (15) could come from misapplying the formula or misunderstanding the operations involved. Each of these options fails to accurately reflect the calculations performed.
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