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SIZIF [17.4K]
3 years ago
8

X^2-9 can be factored using the formula

Mathematics
1 answer:
Gala2k [10]3 years ago
6 0

Answer:

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

Step-by-step explanation:

x^2 -9

Rewriting as

x^2 - 3^2

We notice that this is the difference of squares

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

x^2 - 3^2 = (x-3)(x+3)

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Answer:

4. Tell your interviewer what you do know.

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Step-by-step explanation:

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3 years ago
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If rectangle ABCD is rotated counter clock wise 90º about the origin, what will be the coordinates of the vertex D'?
7nadin3 [17]
So, the best way to do this is translate it to clockwise. 90 degrees counterclockwise is equal to 270 degrees clockwise. So, basically, to rotate, you would follow the following format for each point-
(X,Y) -> (-Y,X)
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A= (-5,5), so A' would be (-5,-5)
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Now, just so you know for future reference, the following are also different formats for different problems--
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A 180 degree Clockwise rotation about the origin would be (X,Y) -> (-X,-Y) *Note, -y also stands for the opposite.
A 270 degree clockwise rotation about the origin would be (X,Y) -> (-Y,X).
For translating---
90 degrees Clockwise = 270 degrees Counter
270 degrees Clockwise = 90 degrees Counter

Hope this helped!
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3 years ago
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Idk know im sorry somwhere between 1 1 2

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4 years ago
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