exam Maths Puzzle Numerical Ability

how to solve this by Q.F
(x-l)(x-m)+(x-m)(x-n)(x-n)(x-l)=o

Please reply me ok

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exam Other Question

Find the equation of the linear fucntion in standard form whose graph passes through (1,-4) and its perpendicular to the line whoes x-intercept is 3 and y-intercept is -2. If 0 < x < 1, which of the following statements must be true?

I. x^2 > x^3
II. x > x/2
III. x > x^3

(A) I only
(B) II only
(C) I and II only
(D) I and III only
(E) I, I