Question

Find all numbers that must be excluded from the domain of the rational expression.(x-3)/(x^2+8x+15)

Answer 1

Answer:

An additional consideration for rational expressions is to determine what values are excluded from the domain. Since division by 0 is undefined, any values of the variables that result in a denominator of 0 must be excluded. Excluded values must be identified in the original equation, not from its factored form