Question

If (x+1) is a factor of bx 3 +x 2 -2x+4b -9, find the value of ‘b’?​

Answer 1

(x+1) is factor of bx³+x²-2x+4b-9
therefore, f(-1)=0;
substituting values,
b(-1)³+(-1)²-2(-1)+4b-9=0
-b+1+2+4b-9=0
3b-6=0
therefore b=2