(15-2x)^(1/2)=x

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Solution for (15-2x)^(1/2)=x equation:


D( x )

15-(2*x) < 0

15-(2*x) < 0

15-(2*x) < 0

15-2*x < 0

15-2*x < 0 // - 15

-2*x < -15 // : -2

x > -15/(-2)

x > 15/2

x in (-oo:15/2>

(15-(2*x))^(1/2) = x // - x

(15-(2*x))^(1/2)-x = 0

(15-2*x)^(1/2)-x = 0

(15-2*x)^(1/2) = -x // + x

(15-2*x)^(1/2) = x // ^ 2

abs(15-2*x) = x^2 // - x^2

abs(15-2*x)-x^2 = 0

x in (-oo:+oo)

abs(15-2*x)

15-2*x >= 0

15-2*x >= 0 // - 15

-2*x >= -15 // : -2

x <= -15/(-2)

x <= 15/2

x in (-oo:15/2>

15-x^2-2*x = 0

x in (15/2:+oo)

-x^2-(-2*x)-15 = 0

abs(15-2*x)-x^2 = 0

/ | 15-x^2-2*x = 0 i x in (-oo:15/2> | -x^2-(-2*x)-15 = 0 i x in (15/2:+oo)

x in (-oo:15/2>

15-x^2-2*x = 0

DELTA = (-2)^2-(-1*4*15)

DELTA = 64

DELTA > 0

x = (64^(1/2)+2)/(-1*2) or x = (2-64^(1/2))/(-1*2)

x = -5 or x = 3

x in (15/2:+oo)

-x^2-(-2*x)-15 = 0

2*x-x^2-15 = 0

DELTA = 2^2-(-15*(-1)*4)

DELTA = -56

DELTA < 0

x in { -5, 3 }

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