i) If A:B = 5:6 and C: A = 7:5, what is the value of A: B: C?
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Answer:
24+729)^2 + (824 -729)^2/824×824 +729×729
=(824 + 729)^2 + (824 - 729)^2/824^2 +729^2
=(824+729)^2 + (824 - 729)^2/(824 + 729)^2
2
+b
2
−2ab
= 824^2 + 729^2 - 2×824 ×729
= 9025
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