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Subjects
Class 10MathematicsPolynomialsOperations on real numbers and the laws of exponentsMedium
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If \(p(x)=4x^2-5x+2\), what is the value of \(p(3)\)?

Answer and explanation

Correct answer: 23

Substitute \(x=3\) into the polynomial: \(p(3)=4(3)^2-5(3)+2=4\times9-15+2=36-15+2=23\). Therefore, the correct value is 23. Exam tip: evaluate the exponent before multiplication, and do not interpret \(4(3)^2\) as \((4\times3)^2\).

Related tags

PolynomialsPolynomial ValueSubstitutionEvaluation Of ExpressionsAlgebraic OperationsOperations On Real Numbers And The Laws Of ExponentsMathematicsClass 10 Mcq
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10 more MCQs
  1. 1Which option is the simplified form of √128?
  2. 2If α = √3 + 1 and β = √3 − 1, what is αβ?
  3. 3Which option gives the correct value of 1/(√10 − 3)?
  4. 4What is the value of (2^3\cdot2^4)?
  5. 5What is the simplified form of (\frac{5^6}{5^2})?
  6. 6What is the simplified form of ((3^2)^4)?
  7. 7If \(a\ne0\), what is the value of \(a^0\)?
  8. 8What is (10^{-2}) equal to?
  9. 9What is the simplified form of ((2\cdot5)^3)?
  10. 10What is the value of \(\left(\frac{3}{4}\right)^2\)?
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