MathematicsMedium38×since 2004Q3926Two poles, AB of length a metres and CD of length a + b (b ≠\ne= a) metres are erected at the same horizontal level with bases at B and D. If BD = x and tan∠\angle∠ACB = 12{1 \over 2}21, then :Ax² + 2(a + 2b)x −-− b(a + b) = 0Bx² + 2(a + 2b)x + a(a + b) = 0Cx² −-− 2ax + b(a + b) = 0Dx² −-− 2ax + a(a + b) = 0Check answerSkip