SOLUTION: rational expressions y^2+4y-21 over y^2+13+42 show work

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Question 44229: rational expressions
y^2+4y-21 over y^2+13+42
show work
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Here the technique is always FACTOR and CANCEL, so we have
y^2+4y-21 / y^2+13+42 =
(y+7)(y-3) / (y+7)(y+6) =
(y-3) / (y+6)