Ответ:
x₁ = 1; x₂ = -2.5
Объяснение:
2x² + 3x - 5 = 0
D = b² - 4ac = 3² - 4*2*(-5) = 9 + 40 = 49
x₁ = (-b + √(D))/2a = (-3 + √(49))/2*2 = (-3 + 7)/4 = 1
x₂ = (-b - √(D))/2a = (-3 - √(49))/2*2 = (-3 - 7)/4 = -2.5
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Ответ:
x₁ = 1; x₂ = -2.5
Объяснение:
2x² + 3x - 5 = 0
D = b² - 4ac = 3² - 4*2*(-5) = 9 + 40 = 49
x₁ = (-b + √(D))/2a = (-3 + √(49))/2*2 = (-3 + 7)/4 = 1
x₂ = (-b - √(D))/2a = (-3 - √(49))/2*2 = (-3 - 7)/4 = -2.5