3(x^2+20x)-1/2(4x+40)

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Solution for 3(x^2+20x)-1/2(4x+40) equation: 


x in (-oo:+oo)

3*(x^2+20*x)-((1/2)*(4*x+40)) = 0

3*(x^2+20*x)+(-1/2)*(4*x+40) = 0

3*(x^2+20*x)-1/2*(4*x+40) = 0

3*(x^2+20*x)-1/2*(4*x+40) = 0

3*x^2+58*x-20 = 0

3*x^2+58*x-20 = 0

3*x^2+58*x-20 = 0

DELTA = 58^2-(-20*3*4)

DELTA = 3604

DELTA > 0

x = (3604^(1/2)-58)/(2*3) or x = (-3604^(1/2)-58)/(2*3)

x = (2*901^(1/2)-58)/6 or x = (-2*901^(1/2)-58)/6

(x-((-2*901^(1/2)-58)/6))*(x-((2*901^(1/2)-58)/6)) = 0

(x-((-2*901^(1/2)-58)/6))*(x-((2*901^(1/2)-58)/6)) = 0

( x-((-2*901^(1/2)-58)/6) )

x-((-2*901^(1/2)-58)/6) = 0 // + (-2*901^(1/2)-58)/6

x = (-2*901^(1/2)-58)/6

( x-((2*901^(1/2)-58)/6) )

x-((2*901^(1/2)-58)/6) = 0 // + (2*901^(1/2)-58)/6

x = (2*901^(1/2)-58)/6

x in { (-2*901^(1/2)-58)/6, (2*901^(1/2)-58)/6 }

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