Jawabanmu

2013-12-14T19:40:24+07:00
Misalkan log a = Xdan log b = Y
log^2 a - log^2 b / log a + log b = X^2 - Y^2 / X + Y
*Ingat, X^2 - Y^2 = (X - Y)(X + Y)
Jadi, => (X - Y)(X + Y) / X - Y = X + Y = log a - log b