Answer:
for x=+1 , y=3
for x=-1 , y=-3
Step-by-step explanation:
y=3x and x^2+y^2=10
y^2=9x^2
x^2+9x^2=10
10x^2=10
x^2=1
x=1 and x=-1
for x=1 , y=3x that means y=3
for x=-1 , y=3x that means y=-3
