
This is because



(that is, replace any instance of <em>x</em> in the definition of <em>g</em> with √<em>x</em> )
and


(replace any <em>x</em> in <em>f</em> with √<em>x</em> - 1)
Also acceptable:


(assuming <em>x</em> is not negative)
Add 2x to both sides,
3x+9=18
Subtract 9 from both sides. 3x=9
Divide both sides by 3.
x=3
Answer:
A and C quadrilateral and parallelogram
Explanation:
A square is a quadrilateral, meaning it has four sides. Therefore a square is a quadrilateral.
have a nice day! Also could you mark me brainliest I'm trying to rank up! :D