HELP ME PLZZZ ASAP! Tyler’s work is incorrect. Explain the error he made.

Tyler is simplifying the expression 6 − 2x + 5 + 4x. Here is his work:
6 − 2 + 5 + 4
(6−2) + (5+4)
4 + 9
13

the quotient is 4x^2 - 27x + 167 with a remainder of -996

step-by-step explanation:

in synthetic division, use -6 as the divisor and use the coefficients {4, -3, 5, 6}:

-6     )   4     -3     5     6

                -24   162 -1002

          4   -27   167   -996

thus, the quotient is 4x^2 - 27x + 167 with a remainder of -996.

note:   your "4x°-3x+5x+6" is ambiguous / incomplete.   i had to assume that you meant '4x^3 - 3x^2 + 5x + 6."

answer: y = -2.5x - 15

              (-6,0)

step-by-step explanation: