Решите срочно))))))))))))))

Question

Решите срочно))))))))))))))

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Answer 1

 

 

Answer 2

x² - 10x +18 = 0;

Д = 100 - 4*18 = 100 -72 = 28 = 2√7;

х₁ = (10 - 2√7)/2 = 5 - √7;

х₂ = (10 + 2√7)/2 = 5 + √7.

ОТВЕТ:  5 - √7; 5 + √7.