Respuesta:
A) -2x
Explicación paso a paso:
[tex]x(3x + 4) - 3( {x}^{2} + 2x) \\ 3 {x}^{2} + 4x - 3( {x}^{2} + 2x) \\ 3 {x}^{2} + 4x - (3 {x}^{2} + 6x) \\ 3 {x}^{2} + 4x - 3 {x}^{2} - 6x \\ (3 {x}^{2} - 3 {x}^{2} ) + (4x - 6x) \\ - 2x[/tex]
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Respuesta:
A) -2x
Explicación paso a paso:
[tex]x(3x + 4) - 3( {x}^{2} + 2x) \\ 3 {x}^{2} + 4x - 3( {x}^{2} + 2x) \\ 3 {x}^{2} + 4x - (3 {x}^{2} + 6x) \\ 3 {x}^{2} + 4x - 3 {x}^{2} - 6x \\ (3 {x}^{2} - 3 {x}^{2} ) + (4x - 6x) \\ - 2x[/tex]