Answer:
Step-by-step explanation:
multiply x as a negative.
Example:
f(x) = 3x + 1
f(-x) = -1(3x) + 1
f(-x) = -3x + 1
Equation
is converted to 
<u>Step-by-step explanation:</u>
We need to complete the square to transform the expression x^2+4x+2 into the form a(x-h)^2+k . Let's do this :
We have , following equation to convert as :
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
Comparing this to equation a(x-h)^2+k we get :

Therefore , Equation
is converted to
.