Expanding (2x² + y²)⁴ with Pascal triangle or using binomial theorem gives:
(2x² + y²)⁴ = 16x⁸ + 32x⁶y² + 24x⁴y⁴ + 8x²y⁶ + y⁸
Pretty sure it’s C That one makes the most sense to me please let me know if you get it right
3-y?
-y=-3
cancel minus both side
y=3