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Лика113
@Лика113
July 2022
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Решите уравнение через формулы дискриминанта. [tex] x^{2}+15x-16=0[/tex]
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русская25
X² + 15x - 16 = 0
a=1, b=15, c= -16
D= b² - 4*a*c
D= 15² - 4*1*(-16) = 225 + 64 = 289
x₁, x₂= (-b+-√D)/2*a
x₁= (-15+17)/2*1 = 2/2 = 1
x₂= (-15-17)/2*1 = -32/2 = -16
Ответ: -16;1.
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Answers & Comments
a=1, b=15, c= -16
D= b² - 4*a*c
D= 15² - 4*1*(-16) = 225 + 64 = 289
x₁, x₂= (-b+-√D)/2*a
x₁= (-15+17)/2*1 = 2/2 = 1
x₂= (-15-17)/2*1 = -32/2 = -16
Ответ: -16;1.