Answer:
Option A. \(1\)
Step-by-step explanation:
we know that
A perfect square trinomial is equal to
\((x+a)^{2}=x^{2}+2xa+a^{2}\)
In this problem we have
\(x^{2}+2x\)
equate the equations and solve for a
\(x^{2}+2x=x^{2}+2xa+a^{2}\)
so
\(2x=2xa\)
\(a=1\)
therefore
the perfect square trinomial is equal to \((x+1)^{2}\)
