find fg(x)^ −1 and its domain if fg(x)−>18x² +24x+11
Answers
Answer:
The first term is, 18x2 its coefficient is 18 .
The middle term is, -24x its coefficient is -24 .
The last term, "the constant", is -11
Step-1 : Multiply the coefficient of the first term by the constant 18 • -11 = -198
Step-2 : Find two factors of -198 whose sum equals the coefficient of the middle term, which is -24 .
-198 + 1 = -197
-99 + 2 = -97
-66 + 3 = -63
-33 + 6 = -27
-22 + 9 = -13
-18 + 11 = -7
-11 + 18 = 7
-9 + 22 = 13
-6 + 33 = 27
-3 + 66 = 63
-2 + 99 = 97
-1 + 198 = 197
Observation : No two such factors can be found !!
Conclusion : Trinomial can not be factored
Final result :
18x2 - 24x - 11