How many unit tiles need to added to the expression x^2+4x+3 to form the perfect square trinomial?

Agraph of a trapezoid can have diagonals with slopes that are negative reciprocals and two pairs of adjacent sides that are congruent, true or false, and why

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Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1