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meriva
3 years ago
10

What is the quotient (x3 + 8) ÷ (x + 2)?

Mathematics
2 answers:
KATRIN_1 [288]3 years ago
7 0
<span> -x2 - 2x - 4 which is B</span>
kogti [31]3 years ago
7 0

Answer:  The correct option is (B) x^2-2x+4.

 

Step-by-step explanation:  We are given to find the following quotient:

Q=(x^3+8)\div(x+2)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)

We know the following algebraic formula:

x^3+a^3=(x+a)(x^2-ax+a^2).

So, we have

x^3+8\\\\=x^3+2^3\\\\=(x+2)(x^2-x\times2+2^2)\\\\=(x+2)(x^2-2x+4).

Therefore, from equation (i), we have

Q\\\\=(x^3+8)\div(x+2)\\\\\\=\dfrac{x^3+8}{x+2}\\\\\\=\dfrac{(x+2)(x^2-2x+4)}{(x+2)}\\\\=x^2-2x+4.

Thus, the required quotient is x^2-2x+4.

Option (B) is correct.

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