Can someone check this synthetic division problem?

original equation: 16x^3+80x^2+x+5
------------------
x+5

Carry out the division problem and list the coefficients of the quotient in order:

-5 | 16 80 1 5
-80 0 -5
-----------------------------------
| 16 0 1 0
|

= x^(3-1) =x^2

Final answer: 16x^2+1

Question

Can someone check this synthetic division problem?

original equation: 16x^3+80x^2+x+5
                             ------------------
                                         x+5

Carry out the division problem and list the coefficients of the quotient in order:

-5  | 16        80           1          5
                   -80           0         -5
-----------------------------------
     | 16          0            1            0
     | 

= x^(3-1) =x^2

Final answer: 16x^2+1

anonymous · Answer

Final answer looks correct :)

anonymous · Answer

(16x^2+1)(x+5)=... ; to check :)

anonymous · Answer

Confirmed by Mathematica's PolynomialQuotientRemainder function in 73 micro seconds.