7x2-(6-4x+x2)+2(5-4x-2x2)

simplify the given expression, factorise
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1 Answer

me assume that garbage shood be

7x^2 -(x^2 -4x +6) +2*(-x^2 -4x +5)

become (7x^2 -x^2 -2x^2) +(4x -8x) -6+10

or 4x^2 -4x +4=0

quadratik equashun giv zeroes (roots)=0.5+-0.866025404i

(komplex variabels)
by

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