Question

2 x2 + 12 x minus 110
is equals to zero of the following equation by completing the square​

Answer 1

Answer:

5 or -11

Step-by-step explanation:

2x² + 12x - 110 = 0

4x² + 24x - 220 = 0

(2x)² + 2*2x*6 + (6)² - 36 - 220 = 0 (should add and subtract b² so that we get the formula (a+b)² = a² + 2ab + b²)

(2x + 6)² = 256

2x + 6 = +- √256

2x = +- 16 - 6

x = (16-6)/2 or (-16 -6)/2

x = 5 or -11