Question

find a and b if (+1) and (x+2) are the factors of x^3+3x^2-2ax+b

Answer 1

hi
hope it helps and its correct
$p (1) = 1 + 3 - 2a + b$
$= 4 - 2a + b$
$p( - 2) = - 8 + 12 + 4a + b$
$= 4 + 4a + b$