



 
Sourabh, I think your equation is
The function on the left of the equal sign factors, so factor it and hence solve for x. The expression log_{10}[f(x)] exists for all values of x for which f(x) > 0. Substitute the two solutions you found to 9x^{2}  18x + 5 = 0 into f(x) = (x + 1)(x + 2) to see if this condition is met. Harley  


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