Question

rezolvati in R ecuatia: ​

Answer 1

Răspuns:

• a) S = {0 ; 1/10)
• S = {√10 ; - √10}

Explicatie pas cu pas:

a) - 4x² + 2/5x = 0

- 20x² + 2x = 0

- 2x(10x - 1) = 0

x(10x - 1) = 0

x = 0

10x - 1 = 0 ⇒ x = 1/10

⇒ S = {0 ; 1/10} sau S = {0 ; 0,1}

✩

b) 3/5x² - 6 = 0

3x² - 30 = 0

3x² = 30

x² = 10

x = ± √10

⇒ S = {√10 ; - √10}