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lora16 [44]
3 years ago
13

Which is equivalent to (9y2 – 4x)(9y2 + 4x), and what type of special product is it?

Mathematics
1 answer:
QveST [7]3 years ago
7 0
This is an example of the difference of squares.

a^2 - b^2 = (a-b)(a+b)

So to find the product of <span>(9y</span>²<span> – 4x)(9y</span>²<span> + 4x), we use the formula for the difference of squares.

</span>(9y^2 - 4x)(9y^2 + 4x)\\\\=(9y^2)^2 -(4x)^2\\\\=\boxed{\bf{81y^4 - 16x^2}}<span>
</span>
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A quadrilateral can be inscribed in a circle, if and only if, the opposite angles in that quadrilateral are supplementary.
Setler [38]

The opposite angles are equal to are supplementary to each other or equal to each other.

<h3>What is a Quadrilateral Inscribed in a Circle?</h3>

In geometry, a quadrilateral inscribed in a circle, also known as a cyclic quadrilateral or chordal quadrilateral, is a quadrilateral with four vertices on the circumference of a circle. In a quadrilateral inscribed circle, the four sides of the quadrilateral are the chords of the circle.

The opposite angles in a cyclic quadrilateral are supplementary. i.e., the sum of the opposite angles is equal to 180˚.

If e, f, g, and h are the inscribed quadrilateral’s internal angles, then

e + f = 180˚ and g + h = 180˚

by theorem the central angle = 2 x inscribed angle.

∠COD = 2∠CBD

∠COD = 2b

∠COD = 2 ∠CAD

∠COD = 2a

now,

∠COD + reflex ∠COD = 360°

2e + 2f = 360°

2(e + f) =360°

e + f = 180°.

Learn more about this concept here:

brainly.com/question/16611641

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6 0
2 years ago
Statistics should not be used as a blind man does a lamp-post instead of illumination.
noname [10]

Answer:

Not quite sure what you are aiming for in this question; however, I guess that is true? A blind man wouldn´t simply rely on a lamp-post to get around.  I guess what is being said is that statistics should be used when it is useful? There are plenty of ways people can analyze that statement.

Step-by-step explanation:

5 0
3 years ago
When a window is open, the temperature in a room falls 5ºF every 15 minutes. Before the window is opened, the temperature was ​
tester [92]

Answer:

Answer:(15,65) (30,60)(45,55)

Step-by-step explanation:

Sorry for that kid that did not answer

7 0
3 years ago
Read 2 more answers
P/-8 + 9 &gt; 13 <br> pls explain i don't get it
KonstantinChe [14]

Answer:

p < -32

Step-by-step explanation:

<em>Given:</em> p/-8 + 9 > 13

<em>Rewrite:</em> \frac{p}{-8} + 9 > 13

<em>Subtract 9 from both sides:</em> \frac{p}{-8}  > 4

<em>Move the negative (it is a fraction): </em>\frac{-p}{8} > 4

<em>Multiply both sides by 8:</em> -p > 32

<em>Times by -1 (-p -> -1p): </em>p > -32

<em>Flip the sign (multiplied by a negative): </em>p < -32

Hope this helps, have a nice day :D

3 0
2 years ago
Read 2 more answers
2+2 i need help please help fast fast help
kow [346]

Answer:

uhhhhhh i think its..... 4

Step-by-step explanation:

4 0
3 years ago
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