Question

MEDALLL!!!!!!!!!!!!!!!!!!!!!!!!!!!!
How can x2 = x2 + 2x + 9 be set up as a system of equations?

y = x2 - 9
y = x2 + 2x + 9


y = x2
y = x2 + 2x + 9

y = x2 + 2x
y = x2 + 9

y = x2
y = 2x + 9

Answer 1

Anything wrong about the second set?

Answer 2

hint : if a=b, you can say
y= a
y=b