shelbygreen022 shelbygreen022
  • 15-06-2018
  • Mathematics
contestada

sovle by completeing the square round to the nearest hunderth if nessasary x^2+2x=8
a. x= 2, 4
b. x= -2, 4
c. x= 2, -4
d. x= -2, -4

Respuesta :

ogbonnanaomi247 ogbonnanaomi247
  • 16-06-2018
The answer is C
x² + 2x = 8            2/2=1; 1²=1, then you add to both sides of the equation

x²+ 2x+ 1 = 8 + 1    factor (x+1)(x+1)     

(x+1)² = 9    square root both sides

√(x+1)² = √9

x+1= 3     or      x+1 = -3
x= 3- 1              x= -3-1
x= 2                  x= -4
Answer Link

Otras preguntas

MATH!!! Volume of prisms stuff
g(x) f(x) = −6x − 3 cosine function with y intercept at 0, negative 3 h(x) = 2 cos(x + π) − 1 Using complete sentences, explain which function has the greatest
A 2-column table with 5 rows. Column 1 has entries 25 percent, 25 percent, 25 percent, 25 percent, Total 100 percent. Column 2 has entries 12 dollars, 12 dollar
log(2t+4)=log(14-3t)
a ___ is a type of computer that is small and portable?
Rough winds do shake the darling buds of May How many iambs are found in this line from “Sonnet 18”? Five, because an iamb is a stressed syllable that is emphas
As an estimation we are told £3 is €4. Convert £10.50 to euros.
find the volume of the composite figure
Students who are not eligible for special education may still qualify for modifications or accommodations. True False
Select the best answer in each drop-down list. Sally is asking clarifying questions during a conversation. She is demonstrating Older workers add tremendous va