GGINS SG hi ppl. i'm not really sure how to do this question:2lg5x - lg(1-x) = lg(4-x) + 1it was from a assessment paper.the answer is: x= 2/3 and x= -4Thanks!!!
wishboy SG 2lg5x - lg(1-x) = lg(4-x) + 1 lg (5x)² - lg (1-x) = lg (4-x) + lg 10 lg [25x²/(1-x)] = lg [(4-x)(10)] 25x²/(1-x) = 40 - 10x 25x² = 40 - 10x - 40x + 10x² 15x² + 50x - 40 = 0 3x² + 10x - 8 = 0 (3x - 2)(x + 4) = 0 x = 2/3 or x = -4
SBS261P SG ^ your solution is almost perfect.however, you missed out a final and very important step.can you find out where your mistake is?