Question

Find the value of the discriminant for the
quadratic equation 2x² - x +2=0
plz solve in book and send a photo​

Answer 1

EXPLANATION.

Value of the discriminant.

⇒ 2x² - x + 2 = 0.

As we know that,

⇒ D = Discriminant Or b² - 4ac.

⇒ D = (-1)² - 4(2)(2).

⇒ D = 1 - 16.

⇒ D = -15.

                                                                                                                   

MORE INFORMATION.

Nature of the factors of the quadratic expression.

(1) = Real and different, if b² - 4ac > 0.

(2) = Rational and different, if b² - 4ac is a perfect square.

(3) = Real and equal, if b² - 4ac = 0.

(4) = If D < 0 Roots are imaginary and unequal or complex conjugate.

Answer 2

Answer:

• -15

Step-by-step explanation:

Given

• 2x² - x +2 = 0

To find

• Value of discriminant

Solution

Discriminant =  b² - 4ac

(The discriminant of a quadratic equation tells us whether there are two solutions, one solution, or no solutions)

• (-1)² - 4(2)(2)
• 1 - 16
• -15

∴ Discriminant (D) = -15