Question

What is the difference of the polynomials?
(8r6s3 - 9r5s4 + 3r4s5) - (2r4s5 - 5r3s6 - 4r5s4)

Answer 1

see image.

Explanation:

Since this is a subtraction problem remember to 'add the opposite' So change to addition between the two sets of parenthesis and change all the signs/operations in the second term.

Then combine like terms. This means the terms can only be added or subtracted if the have exactly the same variables and exponents. See image.