Question

One factor of x4+x2-20 is x2+5. The other factor is
(a) *²-4
(b) x-4
(c) *²5
(d) x+4​

Answer 1

Answer:

x²- 4

Step-by-step explanation:

put x² = t ( let)

now, solve the quadratic equation,

on solving...

we get,

(t +5)(t-4)= 0

now put the value of t..

we will get the factors

(x²+5) (x²-4)=0

so, the other factor will be (x²-4)

hope you got your answer...

Answer 2

Step-by-step explanation:

x^2 - 4

that's it