x² - 7x + 10 = 0

b² - 4ac = (-7)² - 4(1)(10)

= 49 - 40

= 9

Answer: A. 9

Answer:

a.9

Step-by-step explanation:

Identify the coefficients a,b,and c of the

quadratic equetion

a=1,b=-7,c=19

Evaluate the discriminant by substituting

a-1,b=-7and c=10

into the expression b2-4ac

(-7)2-4x1x10

calculate the value

9

Solution

9