Exercitiile urmàtoare 3/4

Răspuns:
3.
[tex]1 - x = 4 \\ \\ - x = 4 - 1 \\ \\ - x = 3 \\ \\ x = - 3[/tex]
4.
[tex](x + x)^{3} \div 4x = \\ \\ = (2x)^{3} \div 4x = \\ \\ = 8 {x}^{3} \div 4x = \\ \\ = 2 {x}^{2} [/tex]
Succes! ♡︎♥︎♡︎
Răspuns:
3.
1 - x = 4
-x = 4 - 1
-x = 3
x = - 3 ; x ∈ ℝ
4.
(x+x)³ : (4x)
= (2x)³ : 4x =
= (2x)³/4x =
= 8x³/4x =
= 2x³/x =
= 2x²