Question

Solve the system by the addition method.
x2 - 3y2 = 1
3x2 + 3y2 = 15

Answer choices:
A. {( 1, 2), ( -1, 2), ( 1, -2), ( -1, -2)}
B. {( 1, 2), ( -1, -2)}
C. {( 2, 1), ( -2, 1), ( 2, -1), ( -2, -1)}
D. {( 2, 1), ( -2, -1)}

Answer 1

My guess is D but i'm not 100%

Answer 2

or maybe c

Answer 3

You need to add the two equations together and then simplify the answer.

Answer 4

Give me one minute and I will show you.