169 is the missing term in the polynomial that makes it a perfect square trinomial.
What is a Trinomial ?
A trinomial is a polynomial with three terms .
It is asked to determine the value of the missing term
The missing term should be the one that completes the polynomial to make it a perfect square trinomial
x² + 26 x + ?
x² + 2 .13 x + 169
( x + 13)²
Therefore 169 should be the missing term in the polynomial.
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