I don't understand what i need tp do in this question. Would appreciate some help.
+1223 We can use Stewart's Theorem: https://en.wikipedia.org/wiki/Stewart%27s_theorem#:~:text=In%20geometry%2C%20Stewart's%20theorem%20yields,published%20the%20theorem%20in%201746.
Use the mnemonic "man + dad = bmb + cnc" to help you.
