Ответ:
1) -5 2) (-2 ; 6)
Объяснение:
1) x² + 10x + 25 = 0
D = b² - 4ac = 10² - 4 * 25 = 0
= = = -5
2) x² - 4x - 12 = 0
D = (-4²) - 4 * ( - 12) = 64 > 0
=
= = -2
= = 6
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Ответ:
1) -5 2) (-2 ; 6)
Объяснение:
1) x² + 10x + 25 = 0
D = b² - 4ac = 10² - 4 * 25 = 0
= = = -5
2) x² - 4x - 12 = 0
D = (-4²) - 4 * ( - 12) = 64 > 0
=
= = -2
= = 6