Posted by Sarah on Tuesday, May 20, 2014 at 4:06pm.
simplify. what are the excluded values?
x^2+6x+9/5x+15

math  MathMate, Tuesday, May 20, 2014 at 6:37pm
There is a good chance you have missed out parentheses in the numerator and the denominator.
All fractions have implicit (i.e. understood) parentheses in the numerator and denominator.
I believe your question means
(x²+6x+9)/(5x+15) even though the question does not actually show the brackets. When you reduce the expression to a single line, the parentheses are required.
(x²+6x+9)/(5x+15)
=(x+3)²/5(x+3)
=(x+3)/5 on condition that x≠3
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