5:12 can be written as an equivalent ratio in the form 20:a what is the value of a
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Sorry for the chicken scratch
It says as x approaches negative infinity y approaches negative infinity and as x approaches positive infinity y approaches negative infinity
It says as x approaches negative infinity y approaches negative infinity and as x approaches positive infinity y approaches negative infinity
You get extraneous solutions anytime the radical becomes undefined under the set of real numbers. for example 
does not exsist since the radical cannot be used on a negative number