Solve the simultaneous equations: x^2 + y^2 = 25 and y − 2x = 5

x²+y²=25, y-2x= 5 y = 5+2x  -----> y² = (5+2x)² = 25 + 20x +4x² x² + 4x² + 20x + 25 = 25 5x² + 20 x = 0 x = 0 y = 5+(2*0) y=5