Question

जर x - 2 हा x³ - mx² + 10x - 20 या बहुपदीचा अवयव असेल तर m ची किंमत काढा.

Answer 1

Solution :

Let p(x) = x³ - mx² + 10x - 20

If x -2 is a

factor of p(x) , then

p(2) = 0

=> 2³ - m(2)² + 10×2 - 20 = 0

=> 8 - 4m + 20 - 20 = 0

=> 8 - 4m = 0

=> -4m = -8

=> m = (-8)/(-4)

=> m = 2

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