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Class 9MathematicsExploring Algebraic IdentitiesQuadratic expressionsHardLevel 74
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What is the sum of the values of (x^2-2x+1) at (x=0) and (x=2)?

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Answer and explanation

Correct answer: (2)

At (x=0), the value is (1), and at (x=2), the value is (1), so the sum is (2). Exam tip: find both values separately and add.

Related tags

Value Of ExpressionSubstitutionQuadratic

Frequently asked questions

What is the correct answer to this question?

(2)

Why is this the correct answer?

At (x=0), the value is (1), and at (x=2), the value is (1), so the sum is (2). Exam tip: find both values separately and add.

Which subject and chapter does this question cover?

This is a Class 9 Mathematics question. Chapter: Exploring Algebraic Identities. Topic: Quadratic expressions.

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  1. 1Which expression is a quadratic expression?
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  3. 3If a, b and c are constants, which condition is necessary for \(ax^2+bx+c\) to be a quadratic expression in x?
  4. 4If a quadratic expression has the general form \(ax^2+bx+c\), which condition on \(a\) is necessary for it to be quadratic?
  5. 5Which of the following expressions represents the square of the difference of two terms?
  6. 6Which of the following quadratic expressions can be factorised using the identity for the difference of two squares?
  7. 7The length of a rectangular garden is \(x+5\) metres and its breadth is \(x+3\) metres. Which quadratic expression represents its area?
  8. 8Under which condition can the quadratic trinomial \(x^2+px+q\) be classified as a perfect-square trinomial?
  9. 9Which is the expansion of ((x+3)(x+2))?
  10. 10Which of the following expressions can be written as a difference of squares of two binomials?
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