Question

can anyone answer this i will mark u as brainliest.

Answer 1

ax⁴+bx³+cx²+dx+e
x²-1 is a factor
so,x²-1=0
x²=1
x=√1=±1
x=1,
a(1)⁴+b(1)³+c(1)²+d(1)+e=0

a+b+c+d+e=0
now put x=-1,
a(-1)⁴+b(-1)³+c(-1)²+d(-1)+e=0
=a-b+c-d+e=0
a+c+e=b+d=0