Question

Help Please: Pre Calc. Attaching problem right now.

Answer 1

so far what i did was cancel out the y^2 and ended up with x^2=8..which i broke down to x=4sqrt2...then i got lost

Answer 2

i know i should end up with 6 numbers..i can't see how to get that

Answer 3

i mean 8 numbers...which seems even harder

Answer 4

y=+3 and y=-3; x=sqrt-2

Answer 5

how did you get that?

Answer 6

x^2 + y^2 =7 - let this be equation 1
x^2 - y^2 = 1 - this is equation 2

from eq. 1,
x^2 = 7 - y^2

substitute value of x^2 in eq. 2

7 - y^2 - y^2 = 1

-2*y^2 = -6

y^2 = 3

y = +3 and -3

now just substitute value of y, and get result for x.

Answer 7

ohhh. so what i was doing was wrong? i had it like this: