Решите уравнение 2-9x^2=0

Question

Решите уравнение 2-9x^2=0

Answer 1

2-9x^2=0

-9x^2=-2

x^2=2/9

x^2=+-√2/3

x1=√2/3

x2=-(√2/3)

Answer 2

-9x^2+2=0
9x^2-2=0
D=0-4*9*(-2)=72
x1,2= +-Кор(72)/18
x1=3кор(8)/18= кор(8)/6
x2=-3кор(8)/18= -кор(8)/6

Comments

x₁ = кор(8)/6 =√8 /6 =2√2 /6 = √2 /3 ; x₂ = кор(8)/6 =√8 /6 =2√2 /6 =

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x₂ = -кор(8)/6 = -√8 /6 =- 2√2 /6 = -√2 /3