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JulsSmile [24]
3 years ago
5

(x + 2)(x(square)+ x + 1)Explain it steps

Mathematics
2 answers:
yarga [219]3 years ago
4 0

Answer:

x= 2

x= 1-√-3/2

x = 1+√-3/2

Step-by-step explanation:

(x+2)(x²+x+1) =(x³+x²+x+2x²+2x+2)

(x³+3x²+3x+2)

Dafna11 [192]3 years ago
3 0

Answer:

{x}^{3}  + 3 {x}^{2}  + 3x + 2

Step-by-step explanation:

(x + 2)( {x}^{2}  + x + 1)

=  x( {x}^{2}  + x + 1) + 2( {x}^{2}  + x + 1)

=  {x}^{3}  +  {x}^{2}  + x + 2 {x}^{2}  + 2x + 2

=  {x}^{3} +  3 {x}^{2}  + 3x + 2

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Help Please !
Mamont248 [21]
The answer is <span>Sum of Cubes.

Since there is sign +, we expect it to be the sum. Among all choices, only the last one includes summation, and that is sum of cubes.

Let's check it out.
Sum of cubes can be expresses as:
a</span>³ + b³ = (a + b)(a² - ab + b²)

Let's see what are cube roots of 125 and 8: 
∛125 = ∛5·5·5 = ∛5³ = 5     ⇒     a = 5
∛8 = ∛2·2·2 = ∛2³ = 2     ⇒     b = 2

Now, let's implement that in the equation of sum of cubes:
5³ + 2³ = (5 + 2)(5² - 5·2 + 2²)
125 + 8 = 7 · (25 - 10 + 4)
133 = 7 · 19
133 = 133

Therefore, sum of cubes is the right answer.
6 0
4 years ago
the ratio of stars to stripes is 50 to 13. If there were 400 stars in the parade, how many stripes were there?
Black_prince [1.1K]
I believe it's 104. You would set it up as a fraction so:   
 50/13 and 400/x.
Then you would cross multiply so 13x400 is 5,200. So this divided by 50 = 104. Hope I helped!

5 0
3 years ago
One pound of ground beef makes four hamburger patties. Solve an equation to determine how many pounds of beef are needed to make
OLga [1]
9 pimds of beef are needed to make 36 hamburgers.
3 0
4 years ago
What times 3 gives you 1,000
miv72 [106K]
1,000:3=\frac{1,000}{3}=333\frac{1}{3}\\\\Answer:\boxed{333\frac{1}{3}}\\\\check:\\\\333\frac{1}{3}\times3=\frac{1,000}{3}\times3=1,000
3 0
3 years ago
How do you write 0.2 as a percentage
Viktor [21]
Move the decimal 2 times to the right, so 20%
5 0
3 years ago
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