Preform the indicated operation:
4 over a^2+12a+27 + 5 over a^2+10a+21

What are the values that would be excluded from the domain?

a. 9, -3 and -7
b. -9, 3, and -7
c. -9,-3, and 7
d. -9, -3, and -7

Question

Preform the indicated operation:
4 over a^2+12a+27   +   5 over a^2+10a+21

What are the values that would be excluded from the domain?

a. 9, -3 and -7
b.  -9, 3, and -7
c. -9,-3, and 7
d. -9, -3, and -7

anonymous · Answer

attachment

anonymous · Answer

DENOMINATOR of the first fraction  (x+9)(x+3)
second fraction  (x+7)(x+3)
the values that make any parenthesis = 0
-9,-7,-3  
so choice d