Answer:
16x² + 6x -15
Explanation:
Polynomial given in the question
(16x² -x + 7) - ( 7x+9 ) + ( 8x-13 )
Multiplying by (-1)
16x² -x + 7 +(-1)7x + -(1)9 + ( 8x-13 )
16x² -x + 7 -7x -9 + ( 8x-13 )
16x² -x + 7 - 7x - 9 + 8x - 13
Ordering and rearranging the terms
16x² -x - 7x + 8x + 7 - 13 - 9
Adding and subtracting them up
16x² + x(-1 -1 +8) - 15
16x² + x(6) - 15
16x² + 6x - 15
So, the difference of given polynomial is an 2nd degree polynomial which is
16x² + 6x -15