-4
-2
-1
\(-\frac{1}{4}\)
Correct answer is A
Substituting for x in the equation
\(2(2)^2 + (k+2)2+k = 0 \Rightarrow 8 +2k + 4 + k =0 \Rightarrow 3k =-12; k=-4\)
Correct 241.34(3 x 10\(^{-3}\))\(^2\) to 4 significant figures...
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