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Class 9MathematicsExploring Algebraic IdentitiesQuadratic expressionsHard
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What is the correct split of the middle term for (x^2-9x+20)?

Answer and explanation

Correct answer: (-4x) and (-5x)

(-4-5=-9) and ((-4)(-5)=20). In exams, when constant is positive and middle term is negative, use two negative signs.

Related tags

Quadratic-ExpressionsNegative-MiddleSplitQuadratic ExpressionsExploring Algebraic IdentitiesMathematicsClass 9 Mcq
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  2. 2What will be the factorised form of (r^2-2rs+s^2)?
  3. 3Which expression can be factorised directly using the identity for the difference of two squares?
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  5. 5Which expression is a quadratic expression?
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  7. 7If a, b and c are constants, which condition is necessary for \(ax^2+bx+c\) to be a quadratic expression in x?
  8. 8If a quadratic expression has the general form \(ax^2+bx+c\), which condition on \(a\) is necessary for it to be quadratic?
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  10. 10Which of the following quadratic expressions can be factorised using the identity for the difference of two squares?
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