Subject

    গাণিতিক যুক্তি

    Topic

    ল সা গু ও গ সা গু

    x2-11x+30 এবংx3-4x2-2x-15 . এর গ.সা.গু কত?

    ক)
    x-5
    খ)
    x-6
    গ)
    x2+x+3
    ঘ)
    x2-x+3

    Explanation

    x2 - 11x + 30 = x2 - x(6 +5) + 30 = x2 -6x - 5x + 30 = x(x-6) - 5(x-6) =(x-5)(x-6) x3-4x2-2x-15 either (x-5) or (x-6) or both could be factors inorder to factorize x3 - 4X2 - 2X - 15 WITH x - 5 , x - 5 = 0 => x = 5 substituting x = 5 in the expression x3 - 4X2 - 2X - 15 we get, (5)3 - 4(5)3 -2(5) -15 = 0 therefore x-5 is a factor of x3 - 4X2 - 2X - 15 following the same procedure with x-6 does not yeild zero and hence it is not a factor of x3 - 4X2 - 2X - 15 therefore Greatest Common Factor of the two expressions is (x-5)

    Find Tutors

    View all Tutors