How to simplify this square $(3 \times 4 + 2)^2$? If I have this $(3 \times 4 + 2)^2$,
How can I simplify it with out the final result.
Do I distribute the $^2$ over each number like this:
$(3^2 \times 4^2 + 2^2)$?
What is the rule?

$(3 \times 4 + 2)^2 = (12 + 2)^2 = 14^2 =196$  while $(3^2 \times 4^2 + 2^2) = 9 \times 16 +4 = 144+4 = 148$, so that does not work.
If you want a rule for squares of sums, try: $$(x+y)^2 = x^2 + 2 x y +y^2.$$
