Question

Find a fourth degree polynomial function with real coefficients that has 2, -2 and -3i as zeros.

Answer 1

+3i is the other zero so f(x)=(x-2)(x+2)(x+3i)(x-3i)

Answer 2

The opposite of an imaginary number is always another zero

Answer 3

thank you!

Answer 4

would you help me write this in standard form? f(x) = -2x2+ 8x- 5

Answer 5

I don't understand standard form

Answer 6

@TheDoctorRules

Answer 7

That is already in standard form for a quadratic equation

Answer 8

oh really?!

Answer 9

wow. okay. well thanks so much

Answer 10

Youre welcome :)

Answer 11

The standard form for a quadratic equation is ax2 + bx + c = 0