
Mark M. answered 01/04/19
Tutor
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Mathematics Teacher - NCLB Highly Qualified
Just the left side:
log2 (x2 - 2x) is the exponent on 2 that results in x2 - 2x. This is the meaning of "log"
Now log2 (x2 - 2x) is on 2, so the results is x2 - 2x
x2 - 2x = x - 2
How many real roots?