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adelarslanov110
@adelarslanov110
July 2022
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2x^2+5+3=0
x^2-5x+3=0
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zhenyaM2002
Verified answer
2х² + 5 + 3 = 0
2х² + 8 = 0
2(х² +4)=0 |÷2
х² +4 =0
x² = - 4 уравнение не имеет вещественных корней
х² - 5х + 3 =0
D=(-5)² - 4*1*3 = 25 - 12 = 13
D>0 два корня уравнения
х₁ = (5 - √13)/2 = 1/2 * (5 -√13) = 0,5(5-√13) = 2,5 - 0,5√13
х₂ = (5 +√13)/2= 2,5 +0,5√13
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Answers & Comments
Verified answer
2х² + 5 + 3 = 02х² + 8 = 0
2(х² +4)=0 |÷2
х² +4 =0
x² = - 4 уравнение не имеет вещественных корней
х² - 5х + 3 =0
D=(-5)² - 4*1*3 = 25 - 12 = 13
D>0 два корня уравнения
х₁ = (5 - √13)/2 = 1/2 * (5 -√13) = 0,5(5-√13) = 2,5 - 0,5√13
х₂ = (5 +√13)/2= 2,5 +0,5√13