Details on Heron's missed sqrt(-63): https://nrich.maths.org/13402 https://nrich.maths.org/13402 Apparently there's not much to say about how that mistake came

Details on Heron's missed sqrt(-63): https://nrich.maths.org/13402 https://nrich.maths.org/13402 Apparently there's not much to say about how that mistake came up, though.