Solve this:-

Solve this:- In AABC, Z B = 900. L & M trisect BC. Fig. 11. Prove that = 5AL2 + 3AC2. c Fig. 11 8. 9. In A ABC , D is the midpoint of BC and AE BC. 1 Prove that: AB2+ = 2 AD2+ —BC2 OR AB2+ AC2= 2AD2 +2BD2 BC2 In AABC ZACB = 900 and CD AB. Prove that AC2 AD

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s o l v i n g 7 l e t M C = M L = L B = x A B^{2} + x^{2} = A L^{2} A B^{2} + 4 x^{2} = A M^{2} A B^{2} + 9 x^{2} = A C^{2} e l i m i n a t e x a n d A B 3 x^{2} = A M^{2} - A L^{2} A L^{2} + 8 x^{2} = A C^{2} 8 A M^{2} = 5 A L^{2} + 3 A C^{2} R e g a r d s

Solve this:- ​Solve this:- ​ In AABC, Z B = 900. L & M trisect BC. Fig. 11. Prove that = 5AL2 + 3AC2. c Fig. 11 8. 9. In A ABC , D is the midpoint of BC and AE BC. 1 Prove that: AB2+ = 2 AD2+ —BC2 OR AB2+ AC2= 2AD2 +2BD2 BC2 In AABC ZACB = 900 and CD AB. Prove that AC2 AD