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

HELP ASAP what is the median of the data set 24,31,12,38,12,15 12 19.5 24 23.5

How does the author develop the connection between language and cultural preservation?

A bike rental service charges a $23.50 initial flat rate and then an additional $5.40 per hour. Write an equation in the slope-intercept form where x represents

The question of her decision is one not to be lightly considered, and it is not for me to presume to set myself up as the one person able to answer it. And so I

Which of these is a proportional relationship? A Justin charges $1 for 1 cup of lemonade, $3 for 2 cups of lemonade and $4 for 3 cups of lemonade. B Jared charg

Which shows 34,867 rounded to the nearest hundred? O A 34,900 . B. 34.800 C. 34 500 D. 34.000

Take a moment to analyze this work: What MOST LIKELY represents the type of balance in this work? A. Symmetrical balance B. Asymmetrical balance C. Approximate

I need help with this Order of Operations Escape Room.

Kira forges Lew’s name as the drawer of a stolen check, drawn on Metro Bank, and makes the item payable to Kira. Lew is liable to pay the amount to a. no one.

i need help with this