Question

Which of the following is the value of the discriminant for X²+7x+1=0 * A) -5 B) 17 C) 45​

Answer 1

Answer:

C) 45

Step-by-step explanation:

For a Quadratic Equation of form ax² + bx + c = 0,

   Discriminant (D) = b² - 4ac

Here,

• a = 1
• b = 7
• c = 1

⇒ D = b² - 4ac

⇒ D = (7)² - 4(1)(1)

⇒ D = 49 - 4

⇒ D = 45

∴ Discriminant of the equation x² + 7x + 1 = 0 is 45

KNOW MORE:

• If D > 0, roots are real and distinct.
• If D = 0, roots are real and equal.
• If D < 0, roots are non-real and imaginary.