Equivalent equations are equations of equal values
The system of equations from the given equation are:
and 
The logarithmic equation is given as:

Split the above equation as follows:


Rewrite
as:

Hence, the system of equations from the given equation are:
and 
Read more about systems of equations at:
brainly.com/question/14265399
Answer:
11
Step-by-step explanation:
f(x) = 3x^2
– 4x – 9
Let x = -2
f(-2) = 3 (-2)^2 -4(-2) -9
=3(4) +8 -9
=12 +8 -9
20-9
11
SAS, side angle side congruency