Question

3. By using the factor theorem, show that (x – 3) is
a factor of the polynomial 12x3 - 31x2 - 18x + 9
and then factorise 12x3 - 31x2 – 18x + 9.​

Answer 1

Answer:

0

Step-by-step explanation:

(x-3)=0

x=3

12x3-31x²-18x+9. (put the value of X in this eq.)

12(3)3-31(3)²-18(3)+9

12(27)-31(9)-54+9

324-279-54+9

45-45

0

therefore (x-3)is a factor of 12x3-31x²-18x+9