Answer:
#3: x is approximately 0.37, -5.37, #4: x is approximately 4.19, -1.19
Step-by-step explanation:
You can solve using the quadratic equation or by solving with the perfect square
=
x is approximately 0.37, -5.37
x=2.5
x^2 +4x -4
f(x) = 4x+1
g(x) = x^2 - 5
f(x) + g(x) = 4x+1 + x^2 -5
= x^2 +4x -4