Question

Prove that x^2 - 1 is a factor of ax^3 +bx^2+cx +d, then a=-c and b=-d.

Answer 1

here x^2 - 1 =
x= 1
putting the value in
ax^3+bx^2+cx+d
and its given that a= -c
b= -d
so replacing it
you will get your answers