My Discussion 1 - My assigned number 13 My first rational...

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My assigned number 13. My first rational expression is n 2 – 2n – 15 n – 2 My second rational expression is 8k + 6 8k2 + 2k – 3 Domain of a rational expression is the set of all numbers that can be substituted for the variable in the expression. If a denominator is a real number , it cannot be divided by zero Both of my rational expression I will set the denominator equal to zero to find my excluded values . n-2 = 0 for the first problem to solve for n = n-2 the expression is -2, resulting in a domain (D) equal to all real numbers excluding -2 my expression is written D = {n| n ℜ, n ≠-2 } 8k 2 +2k-3=0 Next I would rewrite the expression 2 2k-1
2k-1=0 factor my expression equal to zero 2k = 1 or 2k=-1 I can add or subtract the 1 k =1/2 or k = -1/2the

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