(45-9x)^(1/2)=x-5

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Solution for (45-9x)^(1/2)=x-5 equation:


D( x )

45-(9*x) < 0

45-(9*x) < 0

45-(9*x) < 0

45-9*x < 0

45-9*x < 0 // - 45

-9*x < -45 // : -9

x > -45/(-9)

x > 5

x in (-oo:5>

(45-(9*x))^(1/2) = x-5 // - x-5

(45-(9*x))^(1/2)-x+5 = 0

(45-9*x)^(1/2)-x+5 = 0

(45-9*x)^(1/2) = 5-x // - 5-x

(45-9*x)^(1/2) = -(5-x) // ^ 2

abs(45-9*x) = (-(5-x))^2 // - (-(5-x))^2

abs(45-9*x)-(-(5-x))^2 = 0

x in (-oo:+oo)

abs(45-9*x)

45-9*x >= 0

45-9*x >= 0 // - 45

-9*x >= -45 // : -9

x <= -45/(-9)

x <= 5

x in (-oo:5>

45-(-(5-x))^2-9*x = 0

x in (5:+oo)

-(-(5-x))^2-(-9*x)-45 = 0

abs(45-9*x)-(-(5-x))^2 = 0

/ | 45-(-(5-x))^2-9*x = 0 i x in (-oo:5> | -(-(5-x))^2-(-9*x)-45 = 0 i x in (5:+oo)

x in (-oo:5>

45-(-(5-x))^2-9*x = 0

45-1*(x-5)^2-9*x = 0

45-1*(x-5)^2-9*x = 0

x-x^2-25+45 = 0

x-x^2+20 = 0

x-x^2+20 = 0

x-x^2+20 = 0

DELTA = 1^2-(-1*4*20)

DELTA = 81

DELTA > 0

x = (81^(1/2)-1)/(-1*2) or x = (-81^(1/2)-1)/(-1*2)

x = -4 or x = 5

(x+4)*(x-5) = 0

(x+4)*(x-5) = 0

( x+4 )

x+4 = 0 // - 4

x = -4

( x-5 )

x-5 = 0 // + 5

x = 5

x in (5:+oo)

-(-(5-x))^2-(-9*x)-45 = 0

9*x-1*(x-5)^2-45 = 0

9*x-1*(x-5)^2-45 = 0

19*x-x^2-45-25 = 0

19*x-x^2-70 = 0

19*x-x^2-70 = 0

19*x-x^2-70 = 0

DELTA = 19^2-(-70*(-1)*4)

DELTA = 81

DELTA > 0

x = (81^(1/2)-19)/(-1*2) or x = (-81^(1/2)-19)/(-1*2)

x = 5 or x = 14

(x-5)*(x-14) = 0

(x-5)*(x-14) = 0

( x-14 )

x-14 = 0 // + 14

x = 14

( x-5 )

x-5 = 0 // + 5

x = 5

x in { 14}

x in { -4, 5 }

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