Question

if X + 3 is a factor of x cube + x square - 2 X + 6 and a + b = 7 find a and b. ​

Answer 1

x³+x²-2x+6

x+3=0

x=-3

(-3)³+(3)²-2(-3)+6

-27+9+6+6

-27+21=-6

it is not a factor

a+b=7

if a=3,b=4

then it satisfies