Respuesta :

ghanami
hello : 
x² + 10x + c 
calculate the discriminant Δ = b²-4ac      a = 1   b = 10  c = c 
Δ = 10²-4c
the trinomial below a perfect square when : Δ = 0
10² -4c = 0
4c = 10²
 c= 25
x²+10x+25 = x² +2(5)x+5² = (x+5)²
alisonjamiemerritt

Answer:

25

Step-by-step explanation:

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