Предмет: Математика, автор: малая80

ОБЪЯСНИТЕ КАК РЕШАТЬ,УМОЛЯЮ х^2+3х=18

Ответы

Автор ответа: gala1585
0
x² + 3x -18 =0
a=1, b=3, c= -18
D=b² - 4ac = 3² - 4 ·1·(-18) = 81  больше 0, корни не равны
x1,2 = -3+-корень из 81 / 2
X1 = 3
X2 = -6
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