makennahaleman makennahaleman

19-08-2020
Mathematics

contestada

Solve x ^2 + 9x + 8 = 0 by completing the square. What are the solutions?

Respuesta :

dannielle dannielle

19-08-2020

Answer:

-1 and -8

Step-by-step explanation:

x^2+2*9/2*x+(9/2)^2-(9/2)^2+8=0

(x+9/2)^2+32/4-81/4=0

(x+9/2)^2-49/4=0

(x+9/2)^2=(7/2)^2

so

x+9/2=7/2

x=7/2-9/2

x=-2/2

x=-1

or

x+9/2=-7/2

x=-7/2-9/2=-16/2

x=-8

Answer Link

Otras preguntas

if 3x + 4 = -5 what is the value of x2 - 4x?

. Nadia wants to fill her rectangular fish tank. The tank measures 2 feet wide, 1 foot long, and 1.5 feet high. The water level in her fish tank needs to be 0.2

I need serious help

rectangular pieces of glass that are used with microscopes

Which expression is equal to 5^4 x 5^8 ? A: 5^12 B: 5^4 C: 5^2 D: 5^−4

The difference between seven times a number and eight more than four times the number

Allison has been hired to work for an auto repair business. she is twenty-four years old. the auto repair business employs fifty employees. allison is paid a sa

Square root of 3.24 =

Plz help... I was trying to figure it out but my answer doesnt look right. 83,456-728.88

complete the number pattern for 3,400,00 34,000 ______ 3.4 ______