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Find the length of DP in the figure. 
MathF4pp2Q8

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AP x BP = CP x DP
9 x 3 = ( 8 + X)X
X2 +8X -27 =0
X= -8 ± √(64+108)
              2
=-8 ±√172
       2
=-8±13.11
       2
=2.557

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