Question

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

Answer 1

(2,4) (-4,16)

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

x = -8 and y= 8

(-8,8) is the answer