11.

3 - pq + pr - rp

03.a - 0.6ab + 0.5b

Classify the following polynomials as monomials, binomials, trinomials. Which polynomials do not fit in any of these three categories?

x + y, 1000, x + x²+x³+x^4, 7 + y +5x, 2y - 3y²+4y² , 4z -15x² , ab +bc + cd +da, p²q + pq² , 2p + 2q.

Add the following:

ab - bc, bc - ca, ca - ab

Add the following:

 a -  b + ab, b - c + bc, c -a +ac

2p² q² - 3pq + 4, 5 +7pq - 3p²q²

Add the following:

1² + m² , m² + n² , n² +l², 21m + 2mn + 2nl

Subtract 4a - 7ab + 3b + 12 from 12a - 9ab + 5b - 3

Subtract 3xy + 5yz - 7zx from 5xy - 2yz - 2zx + 10xyz