Question

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Answer 1

@satellite73 @zepdrix help please:)

Answer 2

\[2x^2 - 8x = -7\]\[x^2-8x+7=0\]

Answer 3

\[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]with
\[a=2,b=-8,c=7\]

Answer 4

oops dropped the two by accident in the first response but the second is right

Answer 5

is D right? @satellite73