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ki77a [65]
3 years ago
6

For number 81 and 84 it asks me to Complete the square to form a perfect-square trinomial. Could someone explain how I find the

answers to these two questions?

Mathematics
2 answers:
marin [14]3 years ago
7 0
To complete the square, you want to add a number that will allow the number to be factored into terms of the form (x + ?)^2

For x^2 + x + ?:
For (x + ?)(x + ?), we want both ? to add up the 1 (the number in front of x), and since both ? have to be the same number, ? must equal 1/2 (1/2 + 1/2 = 1).
Multiplying this out:
(x + 1/2)^2
(x + 1/2)<span>(x + 1/2)
</span>x^2 + x + 1/4

Answer: x^2 + x + 1/4


For x^2 + 6x + ?:
For (x + ?)(x + ?)<span>, we want both ? to add up the 6 (the number in front of x), and since both ? have to be the same number, ? must equal 3 (3 + 3 = 6). </span>
Multiplying this out:
(x + 3)^2
(x + 3)<span>(x + 3)
</span>x^2 + 6x + 9

Answer: <span>x^2 + 6x + 9</span>

nevsk [136]3 years ago
3 0
Completeing the square in form ax^2+b+c=0 1st move c to other side or ignore it if not present 2nd. make sure a=1, if not, divide both sides by a 3rd divide b by 2 and squaer that ((b/2)^2) and add that to both sides factor perfect square 81. ignore c a=1 so good b=1 so 1/2, then squaer that which is 1/4 that is the blank space 1/4 84. ignore c since not present a is equal to 1 b=6 so 1/2 of that is 3, 3^2=9 9 is the blank 81. blank is 1/4 84. blank is 9
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PLEASE HELPPP ! YOU GET BRAINLIEST IF CORRECT!!! ​
dedylja [7]

Answer:

A. 78,5 in

Step-by-step explanation:

Formula for circumference of the circle is π × diameter.

<h2>:- Question</h2>

Find the circumeference of the circle!

<h2>:- Solution</h2>

Circumeference = π × diameter

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8 0
2 years ago
What is the graph of y &gt; x2-9.​
Yakvenalex [24]

Answer:

The 1st graph

Step-by-step explanation:

When you graph the equation in a graphing calc, you should be able to see that the graph most similar would be the 1st one.

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3 years ago
What is the place value 8 in 880,000
polet [3.4K]

Answer:

hundred thousands

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Matilda is planning a walk around the perimeter of wedge park, which is shaped like a circular wedge, as shown below. the walk a
alukav5142 [94]
The area of the circular sector is
A=\frac{1}{2}r^{2}\theta

From that, the equation for the central angle is
\theta=\dfrac{2A}{r^{2}}

The perimeter of the circular sector is the sum of the arc length and twice the radius.
P=2r+r\theta\\\\P=r(2+\theta)

From that, the equation for the central angle is
\dfrac{P}{r}=2+\theta\\\\ \theta=\dfrac{P}{r}-2

The value of r can be found by equating these two expressions for θ.
\dfrac{2A}{r^{2}}=\dfrac{P}{r}-2\\\\2r^{2}-Pr+2A=0\\\\2r^{2}-2.9r+0.5=0

By any of several means, you can find that r=0.2 or 1.25. The latter value corresponds to the requirement that the central angle be less than 90°. The radius is ...
  1.25 miles.
8 0
3 years ago
?? can u please help??
Alexeev081 [22]
X would equal 1/2 the measure of the intercepted arc, or 45/2

Y = 1/2 the difference of the intercepted arcs, so (105-45)/2
4 0
2 years ago
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