22-10-2017
Mathematics

contestada

If X+y+z=2
Xy+xz+yz=-5
X^2 + y^2 + z^2 = 14
Find X, y, and z

Respuesta :

Аноним Аноним

22-10-2017

If we substitute z = 2 - x - y in the last 2 equations it simplifies to 2 equations in x and y:=

x^2 + y^2 + xy - 2x - 2y = 5 and
-x^2 - y^2 - xy + 2x + 2y = -5

if we add these we get 0 = 0 so there are infinite solutions

Answer Link

Otras preguntas

Cytochalasin d of monomers at of existing filaments. when the concentration of g-actin in the cytosol is the critical concentration, the loss of monomers at of

Which types of electromagnetic waves have longer wavelengths than the waves that make up visible light?

Which of the following accurately describes immWhich of the following accurately describes immunity? A. Active immunity can develop from vaccinations. B. Passiv

What happens to the production of fat cells when you become an adult?

The cost to society for underage alcohol use is more than $ ___________ per year for every man, woman and child in the United States. a. 50 b. 100 c. 200

When individuals leave a population, the remaining populations will likely experience a _________ in genetic diversity. decline increase time of no change varia

Read the paragraph. Venice was an interesting destination. You have to travel by boat. We toured a chandelier factory. The colored glass was incredible. We enjo

Carroll izard has argued that ________ involves a combination of some of the 10 basic emotions he identified.

An excellent place to begin a research report is _____. A. in the bookstore B. in the library C. on the Internet D. in the classroom

Diwali, the festival of lights, is a holiday in which religion?