Question

SHOW that 2x-3
is a factor of
X+2x^3-9x^2
12

Answer 1

x=3/2

(3/2)+2(3/2)³-9(3/2)²+12

3/2+2(27/8)-9(9/4)+12

3/2+27/4-81/4+12

6+27-81+48/4

81-81/4

0/4

0

Hence 2x-3 is a factor of x+2x³-9x²+12