Question

Find all the zeros of each polynomial function.

f(x) = x4 – 5x2 – 36


Select one:


a. ±3, ±2i

b. ±3 only

c. ±2i only

d. none of the above

Answer 1

@rational

Answer 2

note x^2 = t

and will get a quadratic equation of t

Answer 3

try to reduce it first to quadratic since the exponents are even and trinomial we have... say x=u^2... so equation is converted to f(u) = u^2 - 5u -36... can apply quadratic formula

Answer 4

yes right but than you see it now you can factoriz it

yes ?

Answer 5

yes

Answer 6

yes you can... :)

Answer 7

so which would it be

Answer 8

f(u)=(u-9)(u+4)

right ?

Answer 9

correct

Answer 10

so do you can continue it now ?

Answer 11

sure

Answer 12

ok was my pleasure

Answer 13

i think its a actuallu

Answer 14

si do you can calcule it here please ?