SOLUTION: solve y^2 4y-5>=0 express result in interval notation

Question 946538: solve
y^2 4y-5>=0 express result in interval notation

Answer by Saleye(10) (Show Source): You can put this solution on YOUR website!
y^2+4y-5>=0
Solution:
Solve: y^2+4y-5=0
-> Factorize:
(y-1)(y+5)=0; y=-5 & y=1.
To find the interval on which it's > zero you can use Sign chart:
Answer/ the intervals on which >=0 is: (-infinity,-5] and [1, infinity)
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