SOLUTION: find the real soultion of the equation. x+√x=20 please help, I dont understand the rules of operations involving radicals and the book as well as my teacher dont tell m

Algebra ->  Radicals -> SOLUTION: find the real soultion of the equation. x+√x=20 please help, I dont understand the rules of operations involving radicals and the book as well as my teacher dont tell m      Log On


   

Question 557885: find the real soultion of the equation.
x+√x=20

please help, I dont understand the rules of operations involving radicals and the book as well as my teacher dont tell me step by step.

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
subtracting x ___ √x = 20 - x

squaring ___ x = 400 - 40x + x^2

subtracting x ___ 0 = x^2 - 41x + 400

factoring ___ 0 = (x - 25)(x - 16)

x = 25 ___ AND ___ x = 16

remember -- square roots can be positive OR negative