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If (p(x)=x^2-4x-1), what are its zeroes?
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Answer and explanation
Correct answer: (2+\sqrt{5}) and (2-\sqrt{5})
Using the quadratic formula, (x=\frac{4\pm\sqrt{16+4}}{2}=2\pm\sqrt{5}). In exams simplify the discriminant.
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What is the correct answer to this question?
(2+\sqrt{5}) and (2-\sqrt{5})
Why is this the correct answer?
Using the quadratic formula, (x=\frac{4\pm\sqrt{16+4}}{2}=2\pm\sqrt{5}). In exams simplify the discriminant.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Polynomials. Topic: Irrational numbers and real numbers.
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