All categories

3 years ago

Find the solutions to the following equation by using the quadratic formula . 2x^2+14x+20=216

Mathematics

1 answer:

vampirchik [111]3 years ago

7 0

Answer:

x = 7 , − 14

Step-by-step explanation:

I believe this is correct.

You might be interested in

The general solution of 2 y ln(x)y' = (y^2 + 4)/x is

Sav [38]

Replace $y'$ with $\dfrac{\mathrm dy}{\mathrm dx}$ to see that this ODE is separable:

$2y\ln x\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{y^2+4}x\implies\dfrac{2y}{y^2+4}\,\mathrm dy=\dfrac{\mathrm dx}{x\ln x}$

Integrate both sides; on the left, set $u=y^2+4$ so that $\mathrm du=2y\,\mathrm dy$ ; on the right, set $v=\ln x$ so that $\mathrm dv=\dfrac{\mathrm dx}x$ . Then

$\displaystyle\int\frac{2y}{y^2+4}\,\mathrm dy=\int\dfrac{\mathrm dx}{x\ln x}\iff\int\frac{\mathrm du}u=\int\dfrac{\mathrm dv}v$

$\implies\ln|u|=\ln|v|+C$

$\implies\ln(y^2+4)=\ln|\ln x|+C$

$\implies y^2+4=e^{\ln|\ln x|+C}$

$\implies y^2=C|\ln x|-4$

$\implies y=\pm\sqrt{C|\ln x|-4}$

4 0

3 years ago

Can you very be kind and answer

Lera25 [3.4K]

area of a circle is PI x r^2

2 = d/2 = 5.4/2 = 2.7 cm

using 3.14 for PI

3.14 x 2.7^2 = 22.89 square inches

360 degree in a circle, shaded area is 180 degree, which is 50%

so 22.89 x .5 = 11.45 cm^2

4 0

3 years ago

Is –5 × –5 positive or negative?

liberstina [14]

Answer:

positive

Step-by-step explanation:

a negative times a negative is always a positive

7 0

3 years ago

Read 2 more answers

In how many ways can 6 states be selected from the top 11 states with the most murders if the order of the 6 states does not mat

Ratling [72]

The answer should be 15.4.

7 0

3 years ago

Can Someone Help Me?

Dima020 [189]

The answer to the question is a

6 0

3 years ago