Question

simplifique a expressão x(2×-1)+(1-3x) e marque a alternativa correta a) x3 b)-x3 c)5 d)-x2

Answer 1

✧ Hey cherry, ao simplificarmos iremos obter: $\boxed{\begin{array}{lr}\mathbf{2x {}^{2} - 4x + 1 }\end{array}}$.

↬ Vamos lá, baby angel...

$\begin{gathered}\qquad\LARGE\red{\boxed{\red{\boxed{\begin{array}{rcl}\mathbf{\red{x(2x - 1) + (1 - 3x)}}\end{array}}}}}\end{gathered}$

↬ Multiplique os termos do parênteses por x.

$\begin{gathered}\qquad\LARGE\red{\boxed{\red{\boxed{\begin{array}{rcl}\mathbf{\red{x \times 2x - x}}\end{array}}}}}\end{gathered}$

↬ Multiplique...

$\begin{gathered}\qquad\LARGE\red{\boxed{\red{\boxed{\begin{array}{rcl}\mathbf{\red{2x {}^{2} - x }}\end{array}}}}}\end{gathered}$

↬ Obtendo:

$\begin{gathered}\qquad\LARGE\red{\boxed{\red{\boxed{\begin{array}{rcl}\mathbf{\red{2x {}^{2} - x + (1 - 3x) }}\end{array}}}}}\end{gathered}$

↬ Já que temos um sinal positivo em frente aos parênteses, a expressão continua a mesma...

$\begin{gathered}\qquad\LARGE\red{\boxed{\red{\boxed{\begin{array}{rcl}\mathbf{\red{2x {}^{2} - x + 1 - 3x}}\end{array}}}}}\end{gathered}$

↬ Já que o termo negativo não tem seu coeficiente representado, será como - 1.

$\begin{gathered}\qquad\LARGE\red{\boxed{\red{\boxed{\begin{array}{rcl}\mathbf{\red{ - 1x - 3x}}\end{array}}}}}\end{gathered}$

↬ Coloque os termos similares em evidência, e some seus coeficientes.

$\begin{gathered}\qquad\LARGE\red{\boxed{\red{\boxed{\begin{array}{rcl}\mathbf{\red{( - 1 - 3)x}}\end{array}}}}}\end{gathered}$

↬ Some...

$\begin{gathered}\qquad\LARGE\red{\boxed{\red{\boxed{\begin{array}{rcl}\mathbf{\red{ - 4x}}\end{array}}}}}\end{gathered}$

↬ Obtendo:

$\begin{gathered}\qquad\LARGE\red{\boxed{\red{\boxed{\begin{array}{rcl}\mathbf{\red{2x {}^{2} - 4x + 1 }}\end{array}}}}}\end{gathered}$

↬ Cálculo completo:

${\Huge{\red{\boxed{\begin{array}{lr}\mathbf{x \times (2x - 1) + (1 - 3x)} \\ \mathbf{2x {}^{2} - x + (1 - 3x) } \\ \mathbf{2x {}^{2} - x + 1 - 3x } \\ \mathbf{2x {}^{2} - 4x + 1}\end{array}}}}}$

〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️

Estude mais em:

• https://brainly.com.br/tarefa/47676786
• https://brainly.com.br/tarefa/11966856
• https://brainly.com.br/tarefa/3565235
• https://brainly.com.br/tarefa/23768540
• https://brainly.com.br/tarefa/31798651
• https://brainly.com.br/tarefa/18405377

〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️

${\red{\boxed{\begin{array}{lr}\mathbf{BY:LOHANY \: EVAN}\end{array}}}}$