5; 3/4
Объяснение:
Д=289
х1=23-17/8=3/4
х2=233+17/8=5
х₁ = 5.
х₂ = 3/4 = 0,75.
4х² - 23х + 15 = 0
D = b² - 4ac
D = (-23)² - 4 · 4 · 15 = 529 - 240 = 289
x1/2 = -b ± √D/2a
x1/2 = 23 ± 17/8
х₁ = 23 + 17/8 = 5
х₂ = 23 - 17/8 = 6/8 = 3/4 = 0,75
5; 3/4
Объяснение:
Д=289
х1=23-17/8=3/4
х2=233+17/8=5
х₁ = 5.
х₂ = 3/4 = 0,75.
Объяснение:
4х² - 23х + 15 = 0
D = b² - 4ac
D = (-23)² - 4 · 4 · 15 = 529 - 240 = 289
x1/2 = -b ± √D/2a
x1/2 = 23 ± 17/8
х₁ = 23 + 17/8 = 5
х₂ = 23 - 17/8 = 6/8 = 3/4 = 0,75