5/2x+1/2x2X+7/2+9/2x

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Solution for 5/2x+1/2x2X+7/2+9/2x equation: 


x in (-oo:+oo)

(1/2)*X*x^2+(5/2)*x+(9/2)*x+7/2 = 0

1/2*X*x^2+7*x+7/2 = 0

DELTA = 7^2-(1/2*7/2*4*X)

DELTA = 49-7*X

49-7*X = 0

49-7*X = 0 // - 49

-7*X = -49 // : -7

X = -49/(-7)

X = 7

DELTA = 0  <=>  t_1 = 7

x = -7/(1/2*2*X) i X = 7

x = -7/X i X = 7

( x = ((49-7*X)^(1/2)-7)/(1/2*2*X) or x = (-(49-7*X)^(1/2)-7)/(1/2*2*X) ) i X > 7

( x = ((49-7*X)^(1/2)-7)/X or x = -(X^-1*((49-7*X)^(1/2)+7)) ) i X > 7

X-7 > 0

X-7 > 0 // + 7

X > 7

x in { -7/X, ((49-7*X)^(1/2)-7)/X, -(X^-1*((49-7*X)^(1/2)+7)) }

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