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Class 10MathematicsQuadratic EquationsMethods of Solving Quadratic EquationsEasyLevel 34
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In completing square method for \(x^2+6x+5=0\), which number is added and subtracted?

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Answer and explanation

Correct answer: (9)

Half of the coefficient (6) is (3), and \(3^2=9\). In exams, use \(\left(\frac{b}{2}\right)^2\).

Related tags

QuadraticCompleting-SquareMethod

Frequently asked questions

What is the correct answer to this question?

(9)

Why is this the correct answer?

Half of the coefficient (6) is (3), and \(3^2=9\). In exams, use \(\left(\frac{b}{2}\right)^2\).

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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10 more MCQs
  1. 1Using factorisation method, what are the roots of (x^2-5x+6=0)?
  2. 2In factorisation method, how will (x^2+7x+12=0) be written?
  3. 3Which is the simplest method to solve (x^2-9=0)?
  4. 4If (x^2=16), what is the value of (x) by square root method?
  5. 5Using the zero-product rule, what are the solutions of x(x−4)=0?
  6. 6Which is the correct formula to find roots of (ax^2+bx+c=0) by quadratic formula?
  7. 7What do we get first after simplifying (2x^2-8=0)?
  8. 8What are the correct factors for (x^2-2x-8=0)?
  9. 9In which form can (x^2+4x+4=0) be written?
  10. 10What is the repeated root of (x^2-6x+9=0)?
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