Question

if d= zero the roots are_____ and each of them is______ (note:the equation is ax²+bx+c=0)​

Answer 1

If D = 0 the roots are real and each of them is equal.

Explanation:

→ D stands for 'Discriminant'.

★ It is used to determine the nature of roots.

★ For a Quadratic Equation of general form ax² + bx + c, the formula used for calculating the value of D is

D = b² - 4ac

★ If D > 0, roots are real and not equal.

If D < 0, roots are not real that is roots are imaginary.

KNOW MORE:

• Using this value of Discriminant, we can find the value of x in a quadratic equation by using the formula:

x = (-b ± √D) ÷ 2a

• There are also other methods for finding value of x in a quadratic equation like splitting of middle term and completing the square method