For the expression:

(b^2−4by)/(2y^2−by) − (4y)/(b−2y)

find the domain.

The required domain is all real values of y, except y = 0 and .

Step-by-step explanation:

The given expression is  

Let,

Therefore, to find the domain of this function means to find those values of variable y for which the x-value exists.

It is clear that the denominator of the two terms in the expression must not be zero for x to exist.

So,

⇒

⇒

Again,

⇒

Therefore, the required domain is all real values of y, except y = 0 and . (Answer)

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb