PRC-2 · Chapter 1 · Question 18 of 45
Two times the square of a positive number, when added to five times the same number, results in 33. What is the number?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) 3
Explanation
The problem translates to the quadratic equation 2x^2 + 5x = 33. Rearranging gives 2x^2 + 5x - 33 = 0. Factoring yields (2x + 11)(x - 3) = 0. Since it must be a positive number, x = 3.
More Linear And Quadratic Equations MCQs
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