Step 1 :Replace y with -y in equation x^2 + 2y^4 = 5: (x^2 + 2(-y)^4 \text{ unchanged })
Step 2 :Replace x with -x in equation x^2 + 2y^4 = 5: ((-x)^2 + 2y^4 = 5 \text{ unchanged })
Step 3 :Replace both x with -x and y with -y in equation x^2 + 2y^4 = 5: ((-x)^2 + 2(-y)^4 = 5 \text{ unchanged })
Step 4 :Answer: D. \( x \)-axis, \( y \)-axis, origin