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factor a^4 + b^2 + c^2 - 2 ( a^2 b - a^ 2 c + bc ) - 2 ( a^2 - b + c ) + 1

prove that 55^62-13^62-13^62+41^62 is divisibile by 13

in a quadrilateral abcd, p and r are the midpoints of ab and cd respectively. also q and s are points on the sides bc and da respectively such that bq equals 2 qc and ds equals 2sa. prove taht the area of quadrilateral pqrs is half that of quadrilateral abcd.

prove that the inequality x(x+1)(x+2)(x+3) >= -1 holds for all real numbers x

hey guys im leaving my current school. what do i have to do. do i tell the school that i'm leaving and write a letter or something? how far out from end of year? do you need to give a reason and an explanation? thanks guys

hey guys im leaving my current school. what do i have to do. do i tell the school that i'm leaving and write a letter or something? how far out from end of year? thanks guys