Question

Solve the quadratic equation by using either a numeric or a graphic approach. x squared minus 16 x minus 64 = 0 a. x = -11.1 or x = -12.4 c. x = 16.3 or x = -2.9 b. x = 19.3 or x = -3.3 d. x = 1.3 or x = -3.4

Answer 1

B.

Explanation:

`x^2 - 16x - 64 = 0`

`(x-8)^2 = 128`

`x = 8 + √(128)`

or

`x=8-√(128)`

so x = 19.3

or x = 3.3