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3 years ago

Evaluate x² + 2x - 4 if x = -4.

Mathematics

2 answers:

PilotLPTM [1.2K]3 years ago

8 0

Answer: 4

x2+2x+4/4ix

Step-by-step explanation: −4fix+x2+2x+−x2=−4+−x2

−4fix+2x=−x2−4

Step 2: Add -2x to both sides.

−4fix+2x+−2x=−x2−4+−2x

−4fix=−x2−2x−4

Step 3: Divide both sides by -4ix.

−4fix/-4xi= −x2−2x−4/4xi

Ivanshal [37]3 years ago

4 0

Answer:

the answer is ;4

Step-by-step explanation:

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Fiesta28 [93]

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2 years ago

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2.) Find the length of the unknown side. Round your answer to the nearest tenth.

Juli2301 [7.4K]

Answer:

14.1

Step-by-step explanation:

Hey There!

This is a right triangle so we have to use the Pythagorean Theorem to solve for the missing side

given the hypotenuse and a leg we do

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3 years ago

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2 years ago

Determine whether or not F is a conservative vector field. If it is, find a function f such that F = -f. If it is not, enter NON

GrogVix [38]

We need to have

$\dfrac{\partial f}{\partial x}=2x-4y$

$\dfrac{\partial f}{\partial y}=-4x+10y-5$

Integrate the first PDE with respect to $x$ :

$\displaystyle\int\frac{\partial f}{\partial x}\,\mathrm dx=\int(2x-4y)\,\mathrm dx\implies f(x,y)=x^2-4xy+g(y)$

Differentiate with respect to $y$ to get

$\dfrac{\partial f}{\partial y}=-4x+10y-5=-4x+\dfrac{\mathrm dg}{\mathrm dy}\implies\dfrac{\mathrm dg}{\mathrm dy}=10y-5$

$\implies g(y)=5y^2-5y+C$

So we have

$f(x,y)=x^2-4xy+5y^2-5y+C$

which means $F$ is indeed conservative.

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3 years ago