Question

Question #6f64b

Answer 1

See below

Explanation:

`2x + y = 0 implies y = - 2x`

And next:

`5x^2 + y^2 = 9 implies 5x^2 + (-2x)^2 = 9`

`implies 9x^2 = 9 implies x = pm 1`

`implies y = pm 2`