Please help will give brainliest to whoever gives the correct answer

Which of the following expressions is equal to 2x^2+8

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

Given the functions, fx) = x^2-4 and g(x) = x+ 2, perform the indicated operation. when applicable, state the domain restriction. f(g(x))