Algebra
posted by Anonymous on .
When a polynomial is divided by x+3, the quotient is x^3+x^24 and the remainder is 8. Find the dividend?

Suppose the question had said:
when a number is divided by 4 the quotient is 6 with a remainder of 1
we would write:
number = 6(4) + 1
= 25
so
f(x) = (x^3 + x^2  4)(x+3) + 8
= x^4 + 3x^3 + x^3 + 3x^2  4x  12 + 8
= x^4 + 4x^3 + 3x^2  4x  4