Ответ:
X^2 - 7x - 14 = 0
D = 49 + 4*14 = 49 + 56 = 105
x1 = (7 + √105)/2;
x2 = ( 7 - √105)/2
x1 + x2 = (7 + √105 + 7 - √105)/2 = 14/2 = 7
Объяснение:
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Ответ:
X^2 - 7x - 14 = 0
D = 49 + 4*14 = 49 + 56 = 105
x1 = (7 + √105)/2;
x2 = ( 7 - √105)/2
x1 + x2 = (7 + √105 + 7 - √105)/2 = 14/2 = 7
Объяснение: