The company charges $ a0 per hour What is the value of b2 - 4ac for the following equation? x (x + 8) = 9

The value of b² - 4 a c = 100

Step-by-step explanation:

Given equation x (x + 8) = 9

⇒ x² + 8 x = 9

⇒ x² + 8 x - 9 = 0

The standard form of quadratic equation

a x ² + b x + c

Here a = 1, b = 8, c = - 9

The value of b² - 4 a c = (8) ² - 4 (1) (-9)

= 64 + 36

= 100

Final answer:-

The value of b² - 4 a c = 100