(x^2-40x+300)/400=0

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Solution for (x^2-40x+300)/400=0 equation: 


x in (-oo:+oo)

(x^2-(40*x)+300)/400 = 0

(x^2-40*x+300)/400 = 0

x^2-40*x+300 = 0

x^2-40*x+300 = 0

DELTA = (-40)^2-(1*4*300)

DELTA = 400

DELTA > 0

x = (400^(1/2)+40)/(1*2) or x = (40-400^(1/2))/(1*2)

x = 30 or x = 10

(x-10)*(x-30) = 0

((x-10)*(x-30))/400 = 0

( x-10 )

x-10 = 0 // + 10

x = 10

( x-30 )

x-30 = 0 // + 30

x = 30

x in { 10, 30 }

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