Question

решите уравнения
х2-1,69=0
4-16х2=0
25х2-100=0​

Answer 1

1) x² - 1,3² = 0

(x - 1,3)(x + 1,3) = 0

x - 1,3 = 0

x₁ = 1,3

x + 1,3 = 0

x₂ = - 1,3

2) 2² - (4x)²= 0

(2 - 4x)(2 + 4x) = 0

2 - 4x = 0

- 4x = - 2

x₁ = 0,5

2 + 4x = 0

4x = - 2

x₂ = - 0,5

3) (5x)² - 10² = 0

(5x - 10)(5x + 10) = 0

5x - 10 = 0

5x = 10

x₁ = 2

5x + 10 = 0

5x = - 10

x₂ = - 2