(5x+21)^1/2=x+3

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Solution for (5x+21)^1/2=x+3 equation: 


x in (-oo:+oo)

((5*x+21)^1)/2 = x+3 // - x+3

((5*x+21)^1)/2-x-3 = 0

(5*x+21)/2-x-3 = 0

(5*x+21)/2+(2*(-x))/2+(-3*2)/2 = 0

5*x+2*(-x)-3*2+21 = 0

3*x-6+21 = 0

3*x+15 = 0

(3*x+15)/2 = 0

(3*x+15)/2 = 0 // * 2

3*x+15 = 0

3*x+15 = 0 // - 15

3*x = -15 // : 3

x = -15/3

x = -5

x = -5

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