Question

What is the discriminant of the equation $2x^2-5x-2=0$ ?

• A. 40
• B. 41
• C. 42
• D. 39

Answer 1

The correct option is B

41

Given: $2x^2-5x-2=0$

Comaping this with the standard form $a{x}^2+bx+c=0$, we get a = 2, b = -5, c = -2

Discriminant, D = $b^2-4ac$

= $(–5{)}^2–4\times 2\times (–2)=25+16=41$