Q. 185.0( 2 Votes )

If (x2+ kx – 3) = (x – 3 ) (x + 1) then k =?
A. 2

B. -2

C. 3

D. -1

Answer :

We have, (x2 + kx – 3) = (x – 3) (x + 1)

So, the value of k can be calculated as follows:


(x2 + kx – 3) = x2 – 3x + x – 3


x2 + kx – 3 = x2 – 2x – 3


On comparing the coefficients, we get,


kx = - 2x


k = - 2


Thus, the value of k = - 2


Hence, option B is correct

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Polynomials - Zero to HeroPolynomials - Zero to HeroPolynomials - Zero to Hero42 mins
Genius Quiz | PolynomialsGenius Quiz | PolynomialsGenius Quiz | Polynomials40 mins
Zeros and Degrees of a PolynomialZeros and Degrees of a PolynomialZeros and Degrees of a Polynomial41 mins
Champ Quiz | PolynomialsChamp Quiz | PolynomialsChamp Quiz | Polynomials29 mins
Genius Quiz |  Division of Algebraic ExpressionsGenius Quiz |  Division of Algebraic ExpressionsGenius Quiz | Division of Algebraic Expressions37 mins
Introduction to PolynomialsIntroduction to PolynomialsIntroduction to Polynomials37 mins
Quiz | Imp. Qs. on Algebraic IdentitiesQuiz | Imp. Qs. on Algebraic IdentitiesQuiz | Imp. Qs. on Algebraic Identities65 mins
Basic understanding of PolynomialsBasic understanding of PolynomialsBasic understanding of Polynomials37 mins
Methods to find zeroes of a Polynomial-2Methods to find zeroes of a Polynomial-2Methods to find zeroes of a Polynomial-246 mins
Remainder Theorem and Factor TheoremRemainder Theorem and Factor TheoremRemainder Theorem and Factor Theorem38 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses