• Answer of this question

    x3-2x2-x+2     - factorise
    Kul Bhushan Mishra's image
    Kul Bhushan Mishra
    It will have two positive and one negative root.
    Putting 1 in the equation we get (1³) - 2 - 1 2=0
    We get (x-1) is a root of the above equation.
    Now,   x²(x-1) -x(x-1) -2(x-1) is the condensed form of cubic equation.
    Now, cubic equation can be written as (x-1)(x²-x-2). Solving for quadratic equation we get 

    (x-1)(x-2)(x 1)

    Written on July 28, 2019, 1:43 p.m.