ineeeeeedhalp ineeeeeedhalp

18-08-2020
Mathematics

contestada

If $(x + y)^2 = 1$ and $xy = -4$, what is the value of $x^2 + y^2$? Please Help!!

Respuesta :

LammettHash LammettHash

18-08-2020

Expanding the first expression gives

[tex](x+y)^2=x^2+2xy+y^2=1[/tex]

Since [tex]xy=-4[/tex], we have

[tex]x^2+2(-4)+y^2=1\implies\boxed{x^2+y^2=9}[/tex]

Answer Link

Otras preguntas

Which law of motion accounts for the following statement? "The gravity of the Sun causes the planets to move in a circular path."

Imagine you accidently mistype the url for your bank and you are redirected to a fake website that collects your information. you have just been a victim of ___

A wave has a wavelength of 3.0m and a frequency of 400mHz. Calculate its speed.

An automobile manufacturer wants to find out what kind of product-related complaints customers have. The company decides to conduct a survey and note the feedba

Match each polynomial to the term that does not change the polynomial's classification when added to it.

The specific and identifiable emotion and/or reaction one experiences and projects in dealing with the demands of life is known as

which polynomial is the product of (2x + 2) and (x + 3)?

apakah rumusan tentang banjir ?

Concerning campaign financing, what is money called that is given to a political party and not to a specific candidate? A. soft money B. party money C. any

A sample of a gas has a pressure of 3.00 atm at 25°c. what would the gas pressure be at 52°c, if the volume remains constant?