Question

Given that x² -x -2 is a factor of x³ +3 x² +ax +b, calculate the values of a and b and hence find the

remaining factor.​

Answer 1

Answer:

a=-24,b=-80

${x}^{2} - x - 2$

roots are

$x = 5 \: and \: - 4$

then a and b are submitted to the above expression then we get a= -24 and b=-80