mjk369 mjk369
  • 04-03-2016
  • Mathematics
contestada

X^2 + y^2=40 and y=x-4 solve this simultaneous equation

Respuesta :

Аноним Аноним
  • 04-03-2016
Write x-4 instead of y.
x²+(x-4)²=40
x²+x²-8x+16=40
2x²-8x-24=0
x²-4x-12=0
(x-6)(x+2)=0
x=6 or x=-2

for x=6, y=6-4 = 2
for x=-2, y=-2-4 = -6
Answer Link

Otras preguntas

what is a signifcant contrubition from woman and how did it affect us?
One goal the French and Spanish colonists had in common in the New World was
What is the oblique asymptote of the function f(x) = the quantity of x squared plus x minus 2, all over x plus 1
Communist governments surrendered one-party control in 1989 and called for free elections in all of the nations of Eastern Europe , EXCEPT
What is the graph of the function? f(x) = 2x2
Which of the following documents established a government without a central leader?a. Constitution of the United States b. Articles of Confederation c. Declarat
What is the slope of the line 5x - 2y = -10?
which shape has a vertex that is also an apex?
If we have two objects with the same mass but different densities (Lets assume object 1 is denser,therefore volume is lower relative to object 2).Assume both ob
Sedimentary rocks are useful as records of past time because of _____.