Respuesta :

gmany

[tex](*)\ (a-b)^2=a^2-2ab+b^2[/tex]



[tex]x^2-20x=17\\\\x^2-2\cdot x\cdot10=17\ \ \ |+10^2\\\\\underbrace{x^2-2\cdot x\cdot10+10^2}_{(*)}=17+10^2\\\\(x-10)^2=117[/tex]


Answer: 10² = 100

slamphear

Answer:

100

Step-by-step explanation:

10^2=100