SOLUTION: solve V5x+21 =x+3 the V is suppose to be the square root symbol, the 5x+21 in under the entire root

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Question 475007: solve
V5x+21 =x+3

the V is suppose to be the square root symbol, the 5x+21 in under the entire root
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%285x%2B21%29+=x%2B3
square both sides
5x%2B21=+%28x%2B3%29%5E2
5x%2B21=+x%5E2%2B6x%2B9
x%5E2%2B6x-5x=21-9
x%5E2%2Bx-12=0
%28x%2B4%29%28x-3%29=0
x=-4 , x=3