simplify and state your restrictions for the following expression:
a) x^2-x-20/x^2-6x divided by x^2+9x+20/x^2-12x+36
b) 2x^2+3x+1/4x^2-9 minus x^2-3x-1/9-4x^2
a) The simplified expression is:
(x - 5)/(x - 4)
Restrictions: The restriction is x ≠ 4.
b) The simplified expression is:
-14x^2 + 40x + 10)/(12x^2 + 3x - 9)
Restrictions: There are no additional restrictions for this expression.