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if the polynomials x^2-4m+2 and 3x^2-2mx-4 have a common linear factor,find the values of m

2007-03-02 22:06:27 · 4 answers · asked by sneha r 2 in Science & Mathematics Mathematics

4 answers

If two polynomials are said to share a common linear factor, it means that the same linear expression comes in the factorisation of both polynomials.
Let any polynomial ax^2 + bx + c have x - d as factor. x - d is a factor of some other polynomial px^2 + qx + r. x - d is the common linear factor of both polynomials.
a, b, c, d, p,q and r are all constants.

2007-03-02 22:26:46 · answer #1 · answered by Akilesh - Internet Undertaker 7 · 0 0

If x-a is a common factor of x^2-4m+2 and 3x^2-2mx-4 then x-a should devide (x+[4m-2]^1/2)(x-[4m-2]^1/2) so 4m-2 should be a root of 3x^2-2mx-4 then 3[4m-2]-2m([4m-2])-4=0

2007-03-02 22:50:47 · answer #2 · answered by Ahmad k 2 · 0 0

Let roots of the equation of a,b & b,c
a + b = 4m b + c = 2m/3
ab = 2 bc = -4/3

4 equations 4 unknowns.
Solve equation to get value of m.
(x - b) is common linear factor.

2007-03-02 23:44:12 · answer #3 · answered by nayanmange 4 · 0 0

i think it just means if graphed they hit each other at a point which would mean that both linear equations would be true at the same time. which essentially means that both of those equations are true

so just solve x^2-4m+2 = 3x^2-2mx-4

it might have more than 1 value though

2007-03-02 22:10:38 · answer #4 · answered by Anonymous · 0 0

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