(x-1/2)(2x^2-16x-18)=0

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Solution for (x-1/2)(2x^2-16x-18)=0 equation: 


x in (-oo:+oo)

(x-(1/2))*(2*x^2-(16*x)-18) = 0

(x-1/2)*(2*x^2-16*x-18) = 0

2*x^2-16*x-18 = 0

2*(x^2-8*x-9) = 0

x^2-8*x-9 = 0

DELTA = (-8)^2-(-9*1*4)

DELTA = 100

DELTA > 0

x = (100^(1/2)+8)/(1*2) or x = (8-100^(1/2))/(1*2)

x = 9 or x = -1

2*(x+1)*(x-9) = 0

2*(x-1/2)*(x+1)*(x-9) = 0

( x+1 )

x+1 = 0 // - 1

x = -1

( x-1/2 )

x-1/2 = 0 // + 1/2

x = 1/2

( x-9 )

x-9 = 0 // + 9

x = 9

x in { -1, 1/2, 9 }

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