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Alexeev081 [22]
3 years ago
14

Which of the following is the result of completing the square for x2 + 8x - 6 ?

Mathematics
2 answers:
sergey [27]3 years ago
7 0
X^2+8x-6=0
(x+8/2)^2-(8/2)^2-6=0
(x+4)^2-16-6=0
(x+4)^2-22=0

x+4= ± square root 22

x=-4 + square root 22 or x=-4 - square root 22
=0.6904 =-8.6904
melamori03 [73]3 years ago
5 0
STEP 1- since 6 doesn't contain the variable to solve for move it to the right side of the equation by subtracting 6 from both sides
X^2-8X=-6
STEP 2- create a trinomial square on the left side of the equation find the value that is equal to the square of half of b the coefficient of x 
(b/2)^2 =(-4)^2
STEP 3- add the term to each side of the equation
x^2-8x+(-4)^2=-6=(-4) 
STEP 4- simplify the equation
x^2-8x+16=10 
STEP 5- factor the perfect trinomial square into (x-4)^2
(x-4)^2=10
STEP 6-solve the equation for x
x=4= square root of 10

 
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What is the answer to this question I’m stumped.
romanna [79]

Answer:

6x = 16

Step-by-step explanation:

We can write this as a proportion

6         8

---- = ----------

2         x

Using cross products

6x = 2*8

6x = 16

6 0
3 years ago
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5x + 2 = 22 plzzzzzz hellpppp
Mamont248 [21]

Answer:

x=4

Step-by-step explanation:

subtract 2 from both sides---

5x + 2 - 2 = 22 - 2

simplify ---

5x=20

Divide both sides by 5 -----

5x/5 = 20/5

simplify -----

x-4

hope this helps :)

5 0
2 years ago
Suppose<br> cos(π/2−x) =3/5, cos x =4/5<br> find sin, tan, csc, sec, cot
Pani-rosa [81]
Cos (π/2 - x) = sin x = 3/5
tan x = sin x / cos x = 3/5 / 4/5 = 3/4
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sec x = 1/cos x = 1 / 4/5 = 5/4
cot x = 1/tan x = 1 / 3/4 = 4/3.
5 0
3 years ago
Timothy has read 8/9 of the book Holes. Tara has read 2/3 of the book. Phillip reads 4/5 of the book. who read the most
nevsk [136]

Answer: Timothy

Step-by-step explanation:

8/9=0.8888888889

2/3=0.6666666667

4/5=0.8

3 0
3 years ago
Help me pls , will give brainliest
shusha [124]

Answer:

m/2 = 87°

m/4 = 87°

m/7 = 93°

Have a good day, please! :)

5 0
1 year ago
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