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ICE Princess25 [194]
3 years ago
12

The product (x + 3y)(3x – y) =

Mathematics
1 answer:
Digiron [165]3 years ago
4 0

Answer: 3x²-3y²+8xy

Step-by-step explanation:

When you multiply two factors, you want to use the FOIL method.

First

Outer

Inner

Last

(x+3y)(3x-y)                  [distribute by FOIL]

3x²-xy+9xy-3y²            [combine like terms]

3x²+8xy-3y²                 [rewrite]

3x²-3y²+8xy

Now, we know the product is 3x²-3y²+8xy.

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2.Relationships

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3 years ago
How many 4-colored groups can be selected from 13 different colored balloons?
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4 years ago
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3 years ago
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blagie [28]

Answer:

<h2>linear</h2>

Step-by-step explanation:

If the function is linear, then:

\dfrac{rise}{run}=constant

rise=\Delta y=y_2-y_1\\\\run=\Delta x=x_2-x_1

From the table we have pairs of points:

(-2, -5), (-1, -1)

(-1, -1), (0, 3)

(0, 3), (1, 7)

Substitute:

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The ratios are the same. Therefore the function is a linear function.

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