Add the following polynomials, t

- 3x2 - 2xy + y2

- 4x2 - xy + 6y2

x2 + 6xy - y2

Well, it is 3 polynomials so let's break it down first.

(-3x*2 - 2xy + y*2) (-4x*2 - xy + 6y*2)

Let's add these first. The rule is to drop parentheses and add regularly. Bases stay the same, powers add and coefficients multiply.

Ans: (-7x*4 - 3x*2 y*2 + 7y*4)

Now let's add it with the last one.

The answer is: - 6x*6 + 3x*3 y*3 - 6y*6