Question

3. Solve the following quadratic equation for x and give your answer
correct to two decimal places: *
x2 – 3x – 9 = 0​

Answer 1

Answer:

21

Step-by-step explanation:

let a = 2

b = 3

c=9

-b +- (-b*-b + 4*a*c)/a*2                    () means square root here

+3 + (3*3 +4*-2*-9)/2*2

3+81/4

84/4

21