non permissable values
posted by Tara on .
i have a hard time understanding the non permissable values could someone please explain. I have solved the following equations but need help determining the values. Also if you could check to see if i did them right it would be alot of help
1. a2+7a+12/a2+4a+4 x a2-a-6/a2-9
2.4/y2+5y+6 - 5/y2-y-12
any number following a letter is to the power of
You only have to worry about the denominators. A denominator can never be equal to zero since division by zero is not defined.
If a denominator is x + 2 , we don't want it to equal zero. So, x cannot = -2 sind that will cause the denominator to equal zero.
that makes much more sense thank you i couldn't figure it out
so a restriction is someting that it cannot be divded or multiplied from right?
ok that helped thank you