SOLUTION: (x+7)^(2/3)=9 I got 20 as one solution for x and I know it's correct, but I'm supposed to find a second one as well. please help ^(2/3) means *to the power of 2/3* in case that

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: (x+7)^(2/3)=9 I got 20 as one solution for x and I know it's correct, but I'm supposed to find a second one as well. please help ^(2/3) means *to the power of 2/3* in case that      Log On