Answer: 243
Explanation:
We have the expression
![3(a + b + c)^2](https://img.qammunity.org/2020/formulas/mathematics/middle-school/od1vp86lzpdbzx5ow9uuiq2l6j394j2f9i.png)
Note that the expression depends on 3 variables
a, b and c
in this case we want to evaluate the expression for
![a = 2\\b = 3\\c = 4](https://img.qammunity.org/2020/formulas/mathematics/middle-school/187ug4rm0f1chjvodm3an0971nve4o563u.png)
Then change the variable a by the number 2, the variable b by the number 3 and the variable c by the number 4
So we have
![3(2 + 3 + 4)^2](https://img.qammunity.org/2020/formulas/mathematics/middle-school/17pk1ky7nxyq8jvo3dpl8oetsnqrvdexz2.png)
Now simplify the expression
![3(9)^2](https://img.qammunity.org/2020/formulas/mathematics/middle-school/zzddhsy9xs590981ag6xiqoq2uvf66b8wl.png)
![3*81=243](https://img.qammunity.org/2020/formulas/mathematics/middle-school/whzj14sxna8yt5yxjgwedi7sap3pu0huz1.png)
The answer is 243