it was 15 this how u do it next time(2,7) and (7,5) left parenthesis, x, start subscript, 1, end subscript, comma, y, start subscript, 1, end subscript, right parenthesis, and , left parenthesis, x, start subscript, 2, end subscript, comma, y, start subscript, 2, end subscript, right parenthesis (x 1 ,y 1 ) and (x 2 ,y 2 ) Distance Formula: , square root of, left parenthesis, x, start subscript, 1, end subscript, minus, x, start subscript, 2, end subscript, right parenthesis, squared, plus, left parenthesis, y, start subscript, 1, end subscript, minus, y, start subscript, 2, end subscript, right parenthesis, squared, end square root Distance Formula: (x 1 x 2 ) 2 +(y 1 y 2 ) 2 square root of, left parenthesis, minus, 2, minus, 7, right parenthesis, squared, plus, left parenthesis, 7, minus, left parenthesis, minus, 5, right parenthesis, right parenthesis, squared, end square root (27) 2 +(7(5)) 2 Plug in square root of, left parenthesis, minus, 2, minus, 7, right parenthesis, squared, plus, left parenthesis, 7, plus, 5, right parenthesis, squared, end square root (27) 2 +(7+5) 2 Negative of a negative is a positive square root of, left parenthesis, minus, 9, right parenthesis, squared, plus, left parenthesis, 12, right parenthesis, squared, end square root (9) 2 +(12) 2 Add/Subtract square root of, 81, plus, 144, end square root 81+144 Square square root of, 225, end square root 225 Perfe