posted by Estela .
21 OVER X squared MINUS 6x is equal to 1 OVER x(x-6)(x+5).
I have to rewrite the ration expression as an equivalent rational expression with the given denominator.
x^2 - 6 x = x(x-6)
So, assuming that x is not equal to zero or 6, multiply both sides by
21 = 1/(x+5) ----->
x = 1/21 - 5 = - 104/21