stewartoliver26 stewartoliver26

03-06-2020
Mathematics

contestada

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

Respuesta :

ronhagrid310 ronhagrid310

03-06-2020

Answer:

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

Hope this helps!

:)

Answer Link

Otras preguntas

How do variables help you model real-world situations? Give an example of a model that uses variables and explain how it helps people make predictions.

suppose you wanna go ice skating. to see if this os a good idea,you decide to check the daily newspaper for the weather report. what specific information should

The circle given by x^2+y^2-4x-10=0 can be written in standard form like this: (x-h)^2+y^2=14. What is the value of h in this equation??

what is the answer to this problem

Can you explain your answer please

I hope to better understand these math questions, could you help me? SSA AAA HL None of the choices are correct.

You randomly select one card from a 52-card deck. find the probability of selecting a king or a five

Find each value of x and y

Consider this quote: "In each of these historical instances . . . mistrust led to misunderstanding, which led to armed conflict." The ellipsis in this quote is

Please Help! I have 2 questions left. Suppose that there are two types of tickets to a show: advance and same-day. Advance tickets cost $20 and same-day ticke