Question

(y - x)(y - x)

Answer 1

(y-x)^2

Answer 2

(a-b)^2 = a^2 -2ab + b^2

Answer 3

(y-x)^2 = y^2 - 2xy + x^2

Answer 4

Thanks! I originally put y^2+2xy+x^2 and it was counted wrong.