Question

If the sum of two zeros of the polynomial $f\left(x\right)=2x^2+(p+3)x+5$ is zero, then the value of p is.

• A. $3$
• B. $4$
• C. $-3$
• D. $-4$

Answer 1

Answer: (C)

$-3$

Given $f\left(x\right)=2x^2+(p+3)x+5$

we know that for $a{x}^2+bx+c=0$ sum of roots $=\frac{-b}{a}$

on comparing $a=2,b=p+3,c=5$

$\frac{-b}{a}=0$ [given]

$\frac{-(p+3)}{2}=0$

$\therefore p=-3$