What are the solutions of x^2-4x-9=29

Question

Mathematics

Deacon Rivers

17 June, 06:00

What are the solutions of x^2-4x-9=29

+3

Answers (2)

Know the Answer?

Robert Gardner · Answer 1

Answer: x = (4-√168) / 2=2-√ 42 = - 4.481

x = (4+√168) / 2=2+√ 42 = 8.481

Emilia Forbes · Answer 2

x = - 4.48, 8.48 to the nearest hundredth.

Step-by-step explanation:

x^2 - 4x - 9 = 29

Completing the square:

(x - 2) ^2 - 4 - 9 = 29

(x - 2) ^2 = 29 + 13 = 42

x - 2 = + / -√42

x = 2 + / -√42

x = 8.48, - 4.48.