SOLUTION: please help me with this equation: {{{log2(x^2+2x)=3}}}

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Question 135505: please help me with this equation: log2%28x%5E2%2B2x%29=3
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
log2%28x%5E2%2B2x%29=3
2%5E%28log2%28x%5E2%2B2x%29%29=2%5E3
%28x%5E2%2B2x%29+=+8+
x%5E2%2B2x+-8+=+0
%28x%2B4%29%28x-2%29+=+0
x = -4, x = 2