SUBTRACTION OF POYNOMIALS


LETS USE THE PREVIOUS ADDITION PROBLEM BUT CHANGE IT TO A SUBTRACTION PROBLEM:

(2r4 + 3r3 - r2 + 5r + 4)  -  (3r4 + 4r2 -2r - 7)  = (2r4 + 3r3 - r2 + 5r + 4)  +  (-3r4 - 4r2 + 2r + 7)

In algebra we change subtraction problems to addition problems by changing the
SUBTRACTION SIGN - to an ADDITION SIGN + and then change the sign of every term that
immediately follows the subtration sign.  Then proceed as if it is an addition problem by combining like terms.


2r4 + 3r3 - r2 + 5r + 4  +  (-3r4 ) + (- 4r2 ) + 2r + 7 =  2r4 + (-3r4 ) + 3r3 - r2 + (- 4r2 ) + 5r  + 2r + 7 + 4 = -r4 + 3r3 - 5r2 + 7r + 11

Try these: 

(4t3 + 2t2 - 7t + 5) - (5t4 + 3t3 + 4t - 7)  answer

(5p4 - 3p2 + 2p) - (2p3  - 4p2 + 4p - 6)   answer

return