find value of k if (2x +1) is the factor of 4x³+4x²+kx- 1.
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if 2x+1 is a factor then we have that 2x+1=
x = -1/2
hence this should satisfy the given
equation
4x^2-kx+k=0 4(-1/2)^2-k(-1/2)+k = 0
1+k/2+k = 0
3k/2 = -1
k = -2/3
hence the value of k is -2/3
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