Find the sum. 2x^2 + 26x + 156=0

Question

Mathematics

Coby Morrow

5 October, 15:23

Find the sum. 2x^2 + 26x + 156=0

+4

Answers (2)

Know the Answer?

Roy Bradshaw · Answer 1

Roy Bradshaw 5 October, 16:29

0

It can not be found it is X e R

Annalise Hart · Answer 2

-13

Step-by-step explanation:

2x²+26x+156=0

x²+13x+78=0

x²+13x=-78

x²+13x+169/4=-143/4

(x+13/2) ²=-143/4

x+13/2 = (i√143) / 2 or x+13/2 = - (i√143) / 2

x = (i√143) / 2-13/2 or x = - (i√143) / 2-13/2

(i√143) / 2-13/2 + ( - (i√143) / 2) - 13/2 = (i√143-13-i√143-13) / 2=-26/2=-13