3. If one zero of the polynomial (x - 1)x^2+
kx + 1 is - 4 then the valu of k is
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Answer:
f(x)=(x-1)x^2+Kx+1
f(-4)=(-4-1)(-4)^2+k(-4)+1.
= -5*16-4k+1.=0
= -79-4k=0
= k=79/4.
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