(1/4)(x+2)^2-9

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Solution for (1/4)(x+2)^2-9 equation: 


x in (-oo:+oo)

(1/4)*(x+2)^2-9 = 0

1/4*(x+2)^2-9 = 0

1/4*(x+2)^2-9 = 0

1/4*x^2+x-8 = 0

1/4*x^2+x-8 = 0

1/4*x^2+x-8 = 0

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

DELTA = 9

DELTA > 0

x = (9^(1/2)-1)/(1/4*2) or x = (-9^(1/2)-1)/(1/4*2)

x = 4 or x = -8

(x+8)*(x-4) = 0

(x+8)*(x-4) = 0

( x+8 )

x+8 = 0 // - 8

x = -8

( x-4 )

x-4 = 0 // + 4

x = 4

x in { -8, 4 }

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