Question

Rezolvati in R ecuatia 16-25x^2=0

Answer 1

Răspuns:

Explicație pas cu pas:

16 - 25 x² = 0

( 4 + 5 x ) ( 4 - 5 x ) = 0

4 + 5 x = 0

5 x = - 4    ⇒   x₁ = - 4/5

___________________

4 - 5 x = 0  

- 5 x = - 4

x = - 4/-5   ⇒   x₂ = 4/5 ∈ R

Answer 2

16 - 25x² = 0

(4 + 5x)(4 - 5x) = 0

4 + 5x = 0

5x = - 4

x1 = - 4/5

4 - 5x = 0

4 = 5x

x2 = 4/5