Question

find a and b if X + 1 and x minus 2 are factors of PX is equal to x cube +a x square + 2 X + b​

Answer 1

Answer:

here, -1 +a-2+b=0

or, a+b =3....... (i)

8+4a+4+b=0

4a+b=-12... (ii)

subtracting (i) from (ii)

3a=-15

so, a =-5

& b=3-a= 3+5=8 ans...