Question

Solve the system x+y=0 −2x−y=8 *Answer should be in ( x , y ) form, will give 40 points *

Answer 1

Answer:

(2,4) (-4,16)

Step-by-step explanation:

Subtract  2 x  from both sides of the equation.

y = 8 − 2 x

Substitute  8 − 2 x  for  y  into  x ^2 − y = 0  then solve for  x .

x = 2 , − 4

Substitute  2  for  x  into  x 2 − y = 0  then solve for  y .

y=4

Substitute  − 4  for  x  into  x 2 − y = 0  then solve for  y .

y=16

Equation form

x = 2 , y = 4

x = − 4 ,  y = 16

Answer 2

Answer:

x = -8 and y= 8

(-8,8) is the answer