# SOLUTION: How Do I Find Any Restricions on the varible.. for example im going to give you 3 random problems and one from my homework.. were learning something like this: x^2 +7x +12 /

Algebra ->  Algebra  -> Rational-functions -> SOLUTION: How Do I Find Any Restricions on the varible.. for example im going to give you 3 random problems and one from my homework.. were learning something like this: x^2 +7x +12 /       Log On

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 Question 444213: How Do I Find Any Restricions on the varible.. for example im going to give you 3 random problems and one from my homework.. were learning something like this: x^2 +7x +12 / x^2-9 : its random numbers .. do i simplify?, i dont understand? this one is Alittle Harder this is from my homework because i dont understand this one . i did the rest butt this is a challengeing one he said : (x+3)(2x-1) / x(x+4) Divided by (-x-3)(2x+1) / x i guess i dont understand because i guess it had the divistion in the middle,, then we have minus and plus. x^2-1/x^2+2x-3 - X-1/x^2-4 and ill use 2 4 and 1 for this + problem: x(x+4)/x-2 + X-1/X^2-4 Please help me this is my last hope i tried with my other answers and got them but i feel i need more practice and the one with the division is the only on i didn't do on my homework. please Answer by ewatrrr(10682)   (Show Source): You can put this solution on YOUR website! ``` Hi Finding Any Restrictions Note: generally the restrictions would be when the DENOMINATOR = 0 as there can be NO zero in a denominator Restrictions: x≠ 3 and x≠ -3 Restrictions: x≠ 0, -4,-3,-1/2 Restrictions: x≠ 2, -2 Note: x^2-4 = (x-2)(x+2) ```