Question

if (x-1) is a factor of ax³+x³-2x+4a-9 then find a

Answer 1

Given ,
x - 1 = 0
x = 1
so,
= ax³+x³-2x+4a-9 
= a(1)³+(1)³-2(1)+4a-9
= a + 1 - 2 + 4a -9
= 5a +1-2-9
5a = -10
a= -10/5
a = -2

Answer 2

I hope that this helps you.