Answer:
-10 + [tex]\sqrt{17}[/tex]
Step-by-step explanation:
the importance of the conjugate is, when multiplied by the numerator and denominator, to remove the radical
for example, if you multiply (-10 - [tex]\sqrt{17}[/tex]) by (-10 + [tex]\sqrt{17}[/tex]) by using the foil method you get:
100 - 10[tex]\sqrt{17}[/tex] + 10[tex]\sqrt{17}[/tex] - 17
the two middle terms drop out and you are left with 83 in the denominator
