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navik [9.2K]
3 years ago
9

The polynomial x^3+8 is equal to

Mathematics
2 answers:
Veseljchak [2.6K]3 years ago
6 0

Answer:

(x + 2)(x² - 2x + 4)

Step-by-step explanation:

x³ + 8 ← is a sum of cubes, which factors in general as

• a³ + b³ = (a + b)(a² - ab + b²)

x³ = (x)³ ⇒ a = x and 8 = 2³ ⇒ b = 2

x³ + 8 = (x + 2)(x² - 2x + 4) ← in factored form


skad [1K]3 years ago
4 0

Answer:

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

Step-by-step explanation:

The binomial can be factored by the binomial form by trinomial. This binomial is a sum of cubes, whose general form presents the following result.

(x^{3} +y^{3} )=(x+y)(x^{2} -xy+y^{2} )

Substituting the values ​​of x and y we will have

x^{3} =x^{3} ;     y^{3} =8

Obtaining the cubic roots of each variable

x=x; y=2

So

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

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