What are the solutions to the equation \( (x-1)(x+2)=-2 \) ? \[ \begin{array}{l}x=-3, x=0 \\ x=-1, x=3 \\ x=-2, x=1 \\ x=0\end{array} \]
Solución de tutoría real
Responder
Solución
Revisado y aprobado por el equipo de tutoría de UpStudy
The Deep Dive
To solve the equation \( (x-1)(x+2) = -2 \), we first expand the left side: \[ (x-1)(x+2) = x^2 + 2x - x - 2 = x^2 + x - 2. \] Now we set the equation to equal zero by moving \(-2\) to the left side: \[ x^2 + x - 2 + 2 = 0 \implies x^2 + x = 0. \] Factoring out \(x\): \[ x(x + 1) = 0. \] This gives the solutions \(x = 0\) or \(x = -1\). So, the correct answer is \(x = -1, x = 0\). Now, if we check each option listed: 1. \(x = -3, x = 0\) - Not valid, as \(-3\) doesn't satisfy the equation. 2. \(x = -1, x = 3\) - Valid for \(-1\), but not for \(3\). 3. \(x = -2, x = 1\) - Not valid, neither satisfies the equation. 4. \(x = 0\) - Valid, but incomplete without \(-1\). So the solution is indeed \(x = -1\) and \(x = 0\).