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3 years ago

Please help...ASAP What is the solution set of x^2 + 5x + 1 = 0?

Mathematics

2 answers:

ycow [4]3 years ago

7 0

Answer:

Here fam it's actually

x=- $\{\frac{-5+\sqrt{21} }{2} } , {\frac{5+\sqrt{21} }{2} }$

Step-by-step explanation:

solmaris [256]3 years ago

4 0

-5 +- sq rt of 21/2

Quadratic formula
A= 1 b= 5 c= 1

-b +- sq rt b^2-4ac /2a
-5 +- sq rt 25-4(1)(1) /2

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A mechanical system is governed by the following differential equation what is the homogeneous solution

Anika [276]

The ODE has characteristic equation

$r^2+6r+9=(r+3)^2=0$

with roots $r=-3$ , and hence the characteristic solution

$y_c=C_1e^{-3t}+C_2te^{-3t}$

For the particular solution, assume an ansatz of $y_p=ae^{-t}$ , with derivatives

$\dfrac{\mathrm dy_p}{\mathrm dt}=-ae^{-t}$

$\dfrac{\mathrm d^2y_p}{\mathrm dt^2}=ae^{-t}$

Substituting these into the ODE gives

$ae^{-t}-6ae^{-t}+9ae^{-t}=4ae^{-t}=4e^{-t}\implies a=1$

so that the particular solution is

$\boxed{y(t)=C_1e^{-3t}+C_2te^{-3t}+e^{-t}}$

7 0

3 years ago

Can someone help me with (a) and (c)? Thanks! ;D

BaLLatris [955]

Answer:

Step-by-step explanation:

a) Mark any two points in line a

(0,7) ; (5,-3)

Find the slope

slope = y2 - y1 /x2-x1

$=\frac{-3-7}{5-0}\\\\=\frac{-10}{5}\\\\=-2$

Equation: y-y1 = m(x-x1)

y - 7 = -2(x - 0)

y - 7 = -2x

y = -2x + 7 --------> line a

c) equation of line b

(2,-1); slope = -2 {as b line is parallel to line a}

y - y1 =m(x-x1)

y -(-1) = -2*(x - 2)

y + 1 = -2x - 2*-2

y + 1 = -2x + 2

y = -2x + 2 -1

y = -2x +1 ------> equation of line b

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3 years ago

Isla's pet rabbit weighs 8 pounds.

nydimaria [60]

If 1 pound = 16 ounces
That means multiply 8*16
So your answer is 128 ounces

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3 years ago

Determine the intercepts of the line. y = 5x – 13 y-intercept:(,) x-intercept:(,)

jonny [76]

Answer:

Step-by-step explanation:

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3 years ago

2. Randy has a house that is worth $250,000 but he still owes $175,000. He has a car that is worth $50,000 but he still owes $37

faust18 [17]

Answer:

$91,200

Step-by-step explanation:

I gave it my best shot sorry if it wrong

3 0

3 years ago