Which of the following is a possible combination of the zeros for g(x) = 2x4 - x3 + 7x2 - 5x - 15
A.
0 positive real zeros
1 negative real zero
3 complex zeros
B.
1 positive real zeros
0 negative real zero
3 complex zeros
C.
1 positive real zeros
1 negative real zero
2 complex zeros
D.
2 positive real zeros
1 negative real zero
1 complex zeros

Question

Which of the following is a possible combination of the zeros for g(x) = 2x4 - x3 + 7x2 - 5x - 15
	A.	
0 positive real zeros
1 negative real zero
3 complex zeros
	B.	
1 positive real zeros
0 negative real zero
3 complex zeros
	C.	
1 positive real zeros
1 negative real zero
2 complex zeros
	D.	
2 positive real zeros
1 negative real zero
1 complex zeros

solomonzelman · Answer

$\large\color{blue}{  (2x-3)(x+1)(x^2+5)  }$

anonymous · Answer

@SolomonZelman  C?

solomonzelman · Answer

Exclude A and B, because when x=0, f(x) is not 0.

solomonzelman · Answer

right there are 2 complex zeros.

solomonzelman · Answer

You are correct, C.

anonymous · Answer

ty