abcd is a square , M is a point of intersection of its diagonals where A(5,4) and C(-1,6) find the equation of BD

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Need asap. solve for the following inequality