PRC-2 · Chapter 1 · Question 30 of 45
Find the roots of the quadratic equation 4x^2 - 8x - 5 = 0.
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: A) 5/2 and -1/2
Explanation
Splitting the middle term: 4x^2 - 10x + 2x - 5 = 0. Factoring by grouping gives 2x(2x - 5) + 1(2x - 5) = 0, which is (2x + 1)(2x - 5) = 0. Therefore, the roots are x = -1/2 and x = 5/2.
More Linear And Quadratic Equations MCQs
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