Using the Quadratic Formula, which of the following is the solution to the quadratic equation x2 - 3x - 28 = 0?

A. x = - 7, - 4

B. x = 7, 4

C. x = - 7, 4

D. x = 7, - 4

Question

Mathematics

Gabriela Martin

11 June, 08:11

Using the Quadratic Formula, which of the following is the solution to the quadratic equation x2 - 3x - 28 = 0?

A. x = - 7, - 4

B. x = 7, 4

C. x = - 7, 4

D. x = 7, - 4

+4

Answers (2)

Know the Answer?

Zara Melendez · Answer 1

x = [ - ) - 3) + / - sqrt ((-3) ^2 - 4*1*-28) ] / 2

= (3 + sqrt 121) / 2 and (3 - sqrt 121) / 2

= 3/2 + 11/2 and 3/2 - 11/

= (1.5 + 5.5) and 1.5 - 5.5

Answer is 7, - 4

Giovanny Cummings · Answer 2

The answer is (x+7) (x-4)

hence, the solution should be C

Using the Quadratic Formula, which of the following is the solution to the quadratic equation x2 - 3x - 28 = 0?A. x = - 7, - 4B. x = 7, 4C. x = - 7, 4D. x = 7, - 4

Using the Quadratic Formula, which of the following is the solution to the quadratic equation x2 - 3x - 28 = 0?

A. x = - 7, - 4

B. x = 7, 4

C. x = - 7, 4

D. x = 7, - 4