Some one please help me with this, I am really confused. I thought I had it right but I don't know what Im doing wrong. Please help me :c

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Find the 6th term of the expansion of (2p - 3q)11. a. -7,185,024p4q7 c. -7,185p4q7 b. -7,185,024p6q5 d. -7,185p6q5 select the best answer from the choices provided a b c d

Which best explains why this triangle is or is not a right triangle ?