Question

Is this correct! I have to find the domain for 12y-15/25y^2-4. I came up with 25y^2-4=0, then (5y-2)(5y+2)=0, then 5y-2=0 , 5y+2=0,adding 2 and -2 to both side equal to 5y=2 and 5y=-2 dividing by 5 gives me y=2/5 and y=-2/5

Answer 1

so your domain is \(D=\{x\in \mathbb{R} \ | \ x\ne \frac{1}{5},\frac{-1}{5}\}\)

Answer 2

all real numbers x such that x does not equal 1/5 or negative 1/5.

Answer 3

What does the D={x=R|x=1/5, 1/5 means

Answer 4

zzr0ck3r, it's 2/5, not 1/5

Answer 5

that notation basically means

the domain D is the set of all numbers such that x can be any real number but it cannot be equal to -2/5 or 2/5

Answer 6

Thanks a lot.