Question

m च्या कोणत्या कि मतीकरिता x+3 हा x³-2mx+21 या बहुपदीचा अवयव असेल?

Answer 1

Solution :

Let p(x) = x³ - 2mx + 21

If ( x + 3 ) is a factor of p(x)

then

p(-3) = 0

=> (-3)³ - 2m(-3) + 21 = 0

=> -27 + 6m + 21 = 0

=> 6m - 6 = 0

=> 6m = 6

=> m = 6/6

=> m = 1

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