The number is 1/16.
What is expression?
An expression is a set of terms combined using the operations +, – , x or/.
Given:
x² + 1/2+ __
By definition of trinomial polynomial a perfect square is
a² + 2ab+ b²
So, divide the middle term by 2 and square the result, as following:
(1/2)/2= 1/4²=1/16
So,b² =1/16
Hence, 1/16 must be added.
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