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inessss [21]
3 years ago
13

^{2} -1)^{6}" alt="(x^{2} +1)(x^{2} -1)^{6}" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
Ann [662]3 years ago
8 0
X^4 - 5x^12 + 9x^10 - 5x^8 - 5x^6 + 9x^4 - 5x^2 + 1
Nady [450]3 years ago
5 0

Answer:

(x²+1)(x²-1)⁶ = x¹⁴-5x¹²+9x¹⁰-5x⁸-5x⁶+9x⁴-5x²+1

Step-by-step explanation:

Pascal triangle 6th row for (a + (-b))⁶;  ... for (x²-1)⁶

a⁶+6a⁵(b)¹+15a⁴(b)²+20a³(b)³+15a²(b)⁴+6a(b)⁵+1*(b)⁶   .. a=x²   b = -1

= x¹²+6x¹⁰(-1)¹+15x⁸(-1)²+20x⁶(-1)³+15x⁴(-1)⁴+6x²(-1)⁵+1*(-1)⁶

= x¹²-6x¹⁰+15x⁸-20x⁶+15x⁴-6x²+1

(x²+1)(x²-1)⁶ = (x²+1)(x¹²-6x¹⁰+15x⁸-20x⁶+15x⁴-6x²+1)

                  = x¹⁴-5x¹²+9x¹⁰-5x⁸-5x⁶+9x⁴-5x²+1

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A block of wood has a mass of 120g and a volume of 200cm3. What is the density of the wood?
ozzi
Density=mass/volume
given mass=120g and volume=200cm3
density=\frac{120g}{200cm^3}=\frac{3}{5} \space\ \frac{g}{cm^3} or abot 0.6


the density is 0.6 \space\ \frac{g}{cm^3}
3 0
4 years ago
Read 2 more answers
Ashley has 4 pairs of low-top sneakers, 7 pairs of high-top sneakers, 3 pairs of sandals, and 1 pair of boots. What is the ratio
Citrus2011 [14]
The ratio of low-top to the total number of shoes is 4:15
6 0
3 years ago
Express each ratio as a fraction in simplest form. A 26:169 B 36 to 78
Nimfa-mama [501]
Ratio A is 26/169, and when simplified it is 2/13.

Ratio B is 36/78, and when simplified it is 6/13.

Hope this helped!
3 0
3 years ago
2.83333333333 simplify
iVinArrow [24]
Sorry but I don’t think you can simplify a repeating number all you can do is round it to 2.83:)
7 0
3 years ago
Read 2 more answers
If you place a 20ft ladder 4ft from the base of the wall, what is the angle measure of the ladder to the ground to the nearest d
artcher [175]

Given:

Length of the ladder = 20 ft

Distance between base of the ladder and wall = 4 ft

To find:

The angle measure of the ladder to the ground to the nearest degree.

Solution:

Ladder is the hypotenuse of a right triangle. Here, we have,

Hypotenuse = 20 ft

Base = 4 ft

In a right angle triangle,

\cos \theta=\dfrac{Base}{Hypotenuse}

\cos \theta=\dfrac{4}{20}

\cos \theta=\dfrac{1}{5}

Taking cos inverse on both sides, we get

\theta=\cos^{-1}\dfrac{1}{5}

\theta=78.46304^\circ

\theta\approx 78^\circ

Therefore, the correct option is A.

8 0
3 years ago
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