Question

$2x^{2} - x.(x - 1) = 6$
quien me ayuda? :(​

Answer 1

Hola!

Respuesta:

x=2

Explicación paso a paso:

Solución:

$2 {x}^{2} - x.(x - 1) = 6 \\ 2 {x}^{2} - {x}^{2} + x = 6 \\ {x}^{2} + x = 6 \\ x(x + 1) = 2(2 + 1) \\ x = 2$

Comprobación:

$2 {x}^{2} - x.( x - 1) = 6 \\ 2( {2}^{2} ) - 2.(2 - 1) = 6 \\ 2(4) - 2.(1) = 6 \\ 8 - 2 = 6 \\ 6 = 6$