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irvinanderson
14.04.2021 •
Mathematics
Calcule o valor numérico da expressão x²–2•y+z para:
![x = 3 \: \: y = 3 \: \: z = 1](/tpl/images/2288/4180/effc5.png)
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Ответ:
x = 7.
Step-by-step explanation:
I am assuming the numbers are angles.
50 + 80 + 8x - 6 = 180
8x - 6 = 180 - 130 = 50
8x = 56
x = 7.