Answer:
7x + 1 Remainder -6x - 1
or
7x + 1 - (6x + 1)/(x² + 1)
Explanation:
(7x³ + x² + x) ÷ (x² + 1)
7x + 1
---------------------
x² + 1 | 7x³ + x² + x
7x³ + 0 + 7x
------------------------
x² - 6x
x² + 0x + 1
--------------------
-6x - 1
(7x³ + x² + x) ÷ (x² + 1) = 7x + 1 Remainder -6x - 1
or
(7x³ + x² + x) ÷ (x² + 1) = 7x + 1 - (6x + 1)/(x² + 1)