I REALLY DON'T UNDERSTAND THIS COULD SOMEONE HELP ME OUT PLEASE

{decimal} 6 = (6 × 8⁰) = 6{decimal}141 = (1 × 8²) + (4 × 8¹) + (1 × 8⁰) = 97{decimal} 374 = (3 × 8²) + (7 × 8¹) + (4 × 8⁰) = 252{decimal}304 = (3 × 8²) + (0 × 8¹) + (4 × 8⁰) = 196{decimal}602 = (6 × 8²) + (0 × 8¹) + (2 × 8⁰) = 386{decimal}263 = (2 × 8²) + (6 × 8¹) + (3 × 8⁰) = 179{decimal}202 = (2 × 8²) + (0 × 8¹) + (2 × 8⁰) = 130{decimal}157 = (1 × 8²) + (5 × 8¹) + (7 × 8⁰) = 111

X^2 - 4x +(4/2^2) + y^2 + 8y + (8/2^2) = -4 + (4/2^2) + (8/2^2)(x + 2)^2 + (y + 4)^2 = -4 + 4 + 16your center is (-2, -4) and the radius is the sqrt of -4 + 4 + 16 which is 4