Answer:
D is the correct answer i think
Step-by-step explanation:
Answer:
addition
Step-by-step explanation:
add 40+8 and you get 48 :P
The answer to the question is 14
x^4 + 14x^2 + 49
(x^2 + 7)^2
perfect square
The angles have to have a 90 degree angle , and they have to be equal too