Question

If x=1 is a zero of x3-2x2+4x+k, write the value of k

Answer 1

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Answer 2

Answer:

given f(x) = x^3-2x^2+4x+k

substitute x = 1

f ( x ) = ( 1 )^3 - ( 2*1^2 ) + ( 4*1 ) + k = 0

1 - 2 + 4 + k = 0

3 + k = 0

k = -3