Q. 19 B4.0( 4 Votes )

# Solve the following equation by factorization method:     Cross multiplying,

7× 6 = 6 × (x2 – 4x - 5)

42 = 6x2 – 24x – 30

6x2 – 24x – -30 - 42= 0

6x2 – 24x – 72= 0

6(x2 – 4x – 12) = 0

x2 – 4x – 12 = 0

On factorizing,

x2 – 6x + 2x – 12 = 0

x(x – 6) + 2(x – 6) = 0

(x + 2) (x – 6) = 0

Solving first part,

x + 2 = 0

x = -2

Solving second part,

x – 6 = 0

x = 6

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos  Champ Quiz |Revealing the relation Between Zero and Coefficients38 mins  Relation Between zeroes and Coefficients46 mins  Interactive Quiz - Geometrical Meaning of the Zeroes32 mins  Relationship between Zeroes and Coefficients-238 mins  Relationship between Zeroes and Coefficients-152 mins  Quiz - Division Algorithm38 mins  Interactive Quiz:Polynomials43 mins  Division Algorithm-130 mins  Relation b/w The Zeroes and Coefficients of Cubic Polynomials54 mins  Solving Imp. Qs. of Olympiad on Polynomials47 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 view all courses 