Question

If the zeros of the quadratic polynomial$ax^2+bx+c$,c≠ 0 are equal , then :

• A. c and b have opposite signs
• B. c and a have opposite signs
• C. c and b have same signs
• D. c and a have same signs

Answer 1

Answer:

D. c and a have same signs

$b^2-4ac=0$

$b^2=4ac$

$\implies$either a and c is positive or a and c is negative