SOLUTION: Please help.. I am having so much trouble Solve: under radical sign: (5x+29) = x+3 (The x+3 is not under a radical sign) Also... Find greatest common factor -18a^3

Algebra ->  Radicals -> SOLUTION: Please help.. I am having so much trouble Solve: under radical sign: (5x+29) = x+3 (The x+3 is not under a radical sign) Also... Find greatest common factor -18a^3       Log On


   

Question 250976: Please help.. I am having so much trouble
Solve:
under radical sign: (5x+29) = x+3 (The x+3 is not under a radical sign)
Also...
Find greatest common factor
-18a^3 , 3a^5
Thank you
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt(5x+29) = x+3
square both sides
5x+29=(x+3)^2
5x+29=x^2+6x+9
0=x^2+x-20
(x+5)(x-4)=0
x=-5
x=4
try them both in the original equation
sqrt(-25+29)=-5+3
sqrt(4)=-2
sqrt(5*4+29)=4+3
sqrt(49)=7