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IRINA_888 [86]
3 years ago
9

2 (m-n) Answer this question knowwwww

Mathematics
1 answer:
Colt1911 [192]3 years ago
5 0

Answer:2m-2n

Step-by-step explanation:

Multiply each term in the parentheses by 2

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How would the expression x2 +8 be rewritten using Sum of Cubes?
Nadusha1986 [10]

Answer:

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So if they meant x^3+8 then the answer is:

(x+2)(x^2-2x+4).

The choice this corresponds to is A.

Step-by-step explanation:

The sum of cubes formula for factoring or expanding:

a^3+b^3=(a+b)(a^2-ab+b^2)

You have I'm assuming they meant:

x^3+8.

Compare x^3+8 to a^3+b^3.

You should see in place of a you have x.

You should also see in place of b you have 2.

a^3+b^3=(a+b)(a^2-ab+b^2)

x^3+8

x^3+2^3

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

x^3+8=(x+2)(x^2-2x+4)

Let's check it for fun.

So we are going to use the distributive property.

We are going to distribute all the terms in the first ( ) to all the terms in the second ( ).

x(x^2-2x+4)   +   2(x^2-2x+4)

x^3-2x^2+4x   + 2x^2-4x+8

Combine like terms:

x^3-2x^2+2x^2+4x-4x+8

Simplify the grouping of like terms:

x^3+0x^2+0x+8

0 times anything is 0:

x^3+8

8 0
3 years ago
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