InterviewSolution
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InterviewSolution
| 1. |
Factorise: x cube -3x square-9x-5 |
| Answer» Put -1in place of x This is the zero of the plolynomialFor finding first factor We know that For findind zero We have to put the small equation =0 let small equation be x+1=0Then value of x=-1 So first factor =x+1For finding second and third factor We have to divide the big equation to the first factorThen after dividing we will get quoteint =x^2-4x-5Now we have to perform the middle term spilitting to complete this question x^2-4x-5X^2-(5x-x)-5X^2-5x+x-5X(x-5)+1(x-5)(X-5)(x+1)These are the first and second factorsSo the question has completed Answer is (x+1)(x+1)(x-5) | |