SOLUTION: could you please help me solve this equation for x log(base 10) (x^2-3x)=1 the answer is -2, 5 but I keep on receiving 0 and 7

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: could you please help me solve this equation for x log(base 10) (x^2-3x)=1 the answer is -2, 5 but I keep on receiving 0 and 7       Log On


   

Question 1094862: could you please help me solve this equation for x
log(base 10) (x^2-3x)=1
the answer is -2, 5 but I keep on receiving 0 and 7
Answer by ikleyn(52866) About Me  (Show Source):
You can put this solution on YOUR website!
.
log%2810%2C%28x%5E2-3x%29%29 = 1  ====>

x^2 - 3x = 10  ==========>

x^2 - 3x - 10 = 0  =====> factor left side ====>

(x-5)*(x+2) = 0.


Answer.  The solutions are x= 5  and  x= -2.