if one zero of the quadratic polynomial x2-x-(2+2K) is -4 then find the value of K.
Please explain step by step.
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Answer:
-4 is the zero so put x=-4
(-4)^2-(-4)-(2+2k)=0
16+4-2-2k=0
18-2k=0
k=-18/-2
k=9
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