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Hi, would appreciate some help! |
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Answer» align="absmiddle" ALT="\huge\star\underline{\mathtt\orange{a} \mathfrak\blue{n } \mathbb\purple{ Տ} \mathbb\pink{wer}}\star\:" class="latex-formula" id="TexFormula1" src="https://tex.z-dn.net/?f=%20%5Chuge%5Cstar%5Cunderline%7B%5Cmathtt%5Corange%7Ba%7D%20%5Cmathfrak%5Cblue%7Bn%20%7D%20%5Cmathbb%5Cpurple%7B%20%D5%8F%7D%20%5Cmathbb%5Cpink%7Bwer%7D%7D%5Cstar%5C%3A" title="\huge\star\underline{\mathtt\orange{a} \mathfrak\blue{n } \mathbb\purple{ Տ} \mathbb\pink{wer}}\star\:"> ->In △AE.B, AB.2=AE2+EB2 -> In △AED, AD2=AE2+ED2 -> In △AEC, AC2=AE2+EC2 Add.ing (1) and (3), we get AB2+AC2=2AE2+EC2+EB2 But EC2+EB2=CB2−2EC.EB ∴AB2+AC2=2AE2+CB2−2EC.EB From (2), AE2=AD2−ED2 Substi.tuting (5) in (4), we get AB2+AC |
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