solve -40.8 =x-18^2/(4x)

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1 Answer

-40.8=x-182/4x,

-163.2x=x2-324,

x2+163.2x=324,

x2+163.2x+81.62=324+81.62 (81.6=163.2/2, completing the square),

(x+81.6)2=324+6658.56=6982.56,

x+81.6=±√6982.56=±83.5617 approx,

x=±83.5617-81.6, so x=1.9617 or -165.1617 approx.

by Top Rated User (1.2m points)

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