CBSE
2026
Class Class 10 · Mathematics
1 Marks · Mcq
✅ Verified
The discriminant of the quadratic equation $x^{2}-3x-2=0$ is :
A. $1$
B. $17$
C. $\sqrt{17}$
D. $-\sqrt{17}$
✅ Answer & Solution
✅ Correct Answer: B
Step 1: Compare with $ax^{2}+bx+c=0$: here $a=1,\; b=-3,\; c=-2$.
Step 2: $D=b^{2}-4ac$.
Step 3: Substitute.
$$D=(-3)^{2}-4(1)(-2)=9+8$$
Step 4: $D=17$.
Correct option is (B) 17.
✅ Verified by Super Admin
