# Answer on Calculus Question for shasha

Question #43012

State how many imaginary and real zeros the function has.

f(x) = x4 - 15x2 - 16

4 imaginary; 0 real

3 imaginary; 1 real

2 imaginary; 2 real

0 imaginary; 4 real

Help me please and show work

f(x) = x4 - 15x2 - 16

4 imaginary; 0 real

3 imaginary; 1 real

2 imaginary; 2 real

0 imaginary; 4 real

Help me please and show work

Expert's answer

Assume that y=x^2. We obtain y^2-15y-16=(y-16)(y+1). So, x^2=16 and x^2=-1.

Thus, zeros are 4,-4,i and -i.

And the answer is 2 imaginary; 2 real.

Thus, zeros are 4,-4,i and -i.

And the answer is 2 imaginary; 2 real.

Need a fast expert's response?

Submit orderand get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

## Comments

## Leave a comment