Compute……………………………………………………………….

The sum of two numbers is 12 and their difference is 18 what are the two numbers

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).