Question 454385: Solve the equation & check your answer(s):
ln(2-2x)=ln(x+5)+ln(x+4) Found 2 solutions by nerdybill, solver91311:Answer by nerdybill(7384) (Show Source):
You can put this solution on YOUR website! ln(2-2x)=ln(x+5)+ln(x+4)
ln(2-2x)=ln(x+5)(x+4)
(2-2x)=(x+5)(x+4)
2-2x= x^2 +9x + 20
2 = x^2 + 11x + 20
0 = x^2 + 11x + 18
0 = (x+9)(x+2)
x = {-9,-2}
Testing each of the solution above, we see that -9 is an "extraneous solution" and must be thrown out leaving:
x = -2
