SAT Question 26eb61c1: Equivalent Expressions answer and explanation with Desmos solution

Choice A is incorrect. This expression is equivalent to $12x^8{y}^2$, not $6x^8{y}^2+12x^2{y}^2$.

Choice B is incorrect. This expression is equivalent to $6x^6{y}^2$, not $6x^8{y}^2+12x^2{y}^2$.

Choice D is incorrect. This expression is equivalent to $6x^6{y}^2+12x^2{y}^2$, not $6x^8{y}^2+12x^2{y}^2$.