Question

what must be subtracted from or added to 6 x 4 + 7 x cube + 26 x square - 25 x + 25 so that it may be exactly divisible by 3 x square -x+4

Answer 1

Divided the given polynomial , from 3x2 - x +4 then remainder cOmes 31x2 -37 x+25 .
So , when you added the given polynomial to its remainder then it may be exactly divisible by 6x4 + 7 x3 + 26 x 2 -25x +25 .