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What are the roots of (x^2-10x+7=0) by quadratic formula?
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Answer and explanation
Correct answer: (x=5\pm3\sqrt{2})
(D=(-10)^2-4(1)(7)=72), so (x=\frac{10\pm6\sqrt{2}}{2}=5\pm3\sqrt{2}). In exams, simplify the square root.
Frequently asked questions
What is the correct answer to this question?
(x=5\pm3\sqrt{2})
Why is this the correct answer?
(D=(-10)^2-4(1)(7)=72), so (x=\frac{10\pm6\sqrt{2}}{2}=5\pm3\sqrt{2}). In exams, simplify the square root.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Quadratic Equations. Topic: Methods of Solving Quadratic Equations.
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