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3 years ago

2x(x+1)-2=2(x-3)(x+3)

Mathematics

2 answers:

Ilya [14]3 years ago

5 0

Answer:

x=-8

Step-by-step explanation:

I solved for x and got this :)

Hope this helps :D

xz_007 [3.2K]3 years ago

3 0

Answer:

$2x(x + 1) - 2 = 2(x - 3)(x + 3) \\ = > 2 {x}^{2} + 2x - 2 = 2( {x}^{2} - {3}^{2} ) \\ = > 2 {x}^{2} + 2x - 3 = 2 {x}^{2} - 2(9) \\ = > 2 {x}^{2} + 2x - 3 \: is \: not \: equal \: to \: 2 {x}^{2} - 1$

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Calculate the flux of the vector field F⃗ (x,y,z)=(exy+9z+4)i⃗ +(exy+4z+9)j⃗ +(9z+exy)k⃗ through the square of side length 3 wit

ikadub [295]

The square (call it $S$ ) has one vertex at the origin (0, 0, 0) and one edge on the y-axis, which tells us another vertex is (0, 3, 0). The normal vector to the plane is $\vec n=\vec\imath-\vec k$ , which is enough information to figure out the equation of the plane containing $S$ :

$(x\,\vec\imath+y\,\vec\jmath+z\,\vec k)\cdot(\vec\imath-\vec k)=0\implies x-z=0\implies z=x$

We can parameterize this surface by

$\vec s(x,y)=x\,\vec\imath+y\,\vec\jmath+x\,\vec k$

for $0\le x\le\frac3{\sqrt2}$ and $0\le y\le3$ . Then the flux of $\vec F$ , assumed to be

$\vec F(x,y,z)=(e^{xy}+9z+4)\,\vec\imath+(e^{xy}+4z+9)\,\vec\jmath+(9ze^{xy})\,\vec k$ ,

$\displaystyle\iint_S\vec F(x,y,z)\cdot\mathrm d\vec S=\iint_S\vec F(\vec s(x,y))\cdot\vec n\,\mathrm dx\,\mathrm dy$

$=\displaystyle\int_0^3\int_0^{3/\sqrt2}\left((4+e^{xy}+9x)\,\vec\imath+(9+e^{xy}+4x)\,\vec\jmath+(e^{xy}+9x)\,\vec k\right)\cdot(\vec\imath-\vec k)\,\mathrm dx\,\mathrm dy$

$=\displaystyle\int_0^3\int_0^{3/\sqrt2}4\,\mathrm dx\,\mathrm dy=\boxed{18\sqrt2}$

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3 years ago

Which ratio is equivalent to 8/6? A. 3/24 B. 24/32 C. 32/24 D. 24/3

Maru [420]

Answer:

Step-by-step explanation:

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3 years ago

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antiseptic1488 [7]

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3 years ago

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Who are the characters in Macbeth?

Schach [20]

Answer:

There are A LOT of characters in Macbeth, but here they are.

Step-by-step explanation:

Macduff

Macbeth

Lady Macbeth

King Duncan

Banquo

Malcolm

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Fleance

Donalbain

Lady Macduff

Young Siward

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Macduff's son

Seyton

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Servant

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Captain

Children

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Angus

Lennox

Porter

Gentlewoman

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That's all that I can think of! Hope I could help you out :)

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3 years ago

4. The fourth grade went on field trip to the art museum. There are 3 classes

miss Akunina [59]

Answer: They will need 3 total buses to fit all of the teachers and students.

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3 years ago