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-x*x+10x+2=0
We simplify the equation to the form, which is simple to understand
-x*x+10x+2=0
We move all terms containing x to the left and all other terms to the right.
+1x+10x=0-2
We simplify left and right side of the equation.
+11x=-2
We divide both sides of the equation by 11 to get x.
x=-0.18181818181818
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