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lyudmila [28]
3 years ago
6

To solve the equation for x by completing the square what equation is equivalent to x^2-x-2=0

Mathematics
1 answer:
GuDViN [60]3 years ago
3 0
So to complete the square in
ax^2+bx+c=d form

make sure a=1
subtract c from both sides
take 1/2 of b and square it
add that to both sides
factor perfect square

1x^2-1x-2=0
a=1
move c to other side
add 2 to oth sides
x^2-1x=2
take 1/2 of b and square it
1/2 of -1=-1/2
squaer it
1/4
add that to both sides
x^2-1x+1/4=2+1/4
factor left side
(x-1/2)=2+1/4

first blank is 1/2

2+1/4=8/4+1/4=9/4

blanks are
1/2 and 9/4
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the cost of a gallon of orange juice is $3.50. What is the maximum number of containers you can buy for $15?
yuradex [85]
$15 divided by $3.50 = 4.28
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3 years ago
For y = 4x + 2x2 – x3, show how to find the value for y, when x = 2. Show your work
shusha [124]
To find the value of y in the given equation, substitute the given value of x to the equation.
   
                               y = 4x + 2x² -x³

Substitute 2 for all x's.
  
                               y = 4(2) + 2(2²) - 2³ = 8

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6 0
3 years ago
What is the area of the sector for the following circle? Round your answer to 4 decimal places. *
Dominik [7]

Answer:

13.0833 ft²

Step-by-step explanation:

From the question given above, the following data were obtained:

Radius (r) = 5 ft

Angle sustained by the sector (θ) = 360 – 300

= 60°

Pi (π) = 3.14

Area of sector (A) =?

The area of the sector can be obtained as follow:

A = θ/360 × πr²

A = 60/360 × 3.14 × 5²

A = 1/6 × 3.14 × 25

A = 1/6 × 78.5

A = 78.5/6

A = 13.0833 ft²

Thus, the area of the sector is 13.0833 ft²

4 0
3 years ago
Read 2 more answers
I know I ask for help a lot but I really just wanna pass
givi [52]

Answer:-15x^{7}y^{4}

Step-by-step explanation:

hope this helps! <3

4 0
3 years ago
Solve 5 - 2x &lt; 7.<br> A) x &lt; -1<br> B) x &gt; -1<br> 0x&lt;<br> -12<br> D) x&gt;-12
Alinara [238K]

Answer:

x < - 1

Step-by-step explanation:

You have to treat it is a linear equation.

First, - 5 from both sides, resulting in -2x < 2.

Lastly, you need to find x on it's own so you have to divide by - 2.

Therefore, the answer would be x < -1.

Hope this helps :)

5 0
2 years ago
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