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find the term that should be added to the expression to form a perfect square trinomial.

Write the resulting perfect square trinomial i factored from.
What is the constant term?
???  type an integer or a simplified faction.
What is the factored from of the trinomail?
???  use integers or fractions fro any numbers in the expression
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1 Answer

x2 + 21x
Divide 21 by 2 and square the result
(21/2)2 = 441/4  = constant term
(x + (21/2))2   or (x + (21/2)) (x + (21/2))
Hope this helps.