Find “m”so that quadratic equation mx(x-7)+49=0, has 2equal roots.

Question

Find “m”so that quadratic equation mx(x-7)+49=0, has 2equal roots.

in progress 0
1 week 2021-09-13T17:59:17+00:00 1 Answer 0 views 0

Answers ( )

    0
    2021-09-13T18:01:00+00:00

    The given quadratic equation is mx (x-7)+49=0

    mx2-7mx+49=0

    a = m, b = -7m, c = 49

    It is given that the roots of this equation are equal.

    D = b2 – 4ac=0

    (-7m)2 – 4(m)(49)=0

    49m2 – 4(m)(49)=0

    49m(m-4)=0

    49m=0 or m – 4 = 0

    m = 0 or m=4

    For m = 0 equation will not be quadratic hence m = 4

Leave an answer

Browse
Browse

18:9+8+9*3-7:3-1*13 = ? ( )