Pregunta
Find all real solutions of the equation. (Enter your answers as a comma-separated list.) \[ (2 x-3)^{2}=81 \] \( x=\square \)
Ask by Maxwell Parry. in the United States
Jan 22,2025
Solución de inteligencia artificial de Upstudy
Respuesta verificada por el tutor
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\( x = -3, 6 \)
Solución
Solve the equation \( (2x-3)^2=81 \).
Solve the quadratic equation by following steps:
- step0: Solve using square roots:
\(\left(2x-3\right)^{2}=81\)
- step1: Simplify the expression:
\(2x-3=\pm \sqrt{81}\)
- step2: Simplify the expression:
\(2x-3=\pm 9\)
- step3: Separate into possible cases:
\(\begin{align}&2x-3=9\\&2x-3=-9\end{align}\)
- step4: Solve the equation:
\(\begin{align}&x=6\\&x=-3\end{align}\)
- step5: Rewrite:
\(x_{1}=-3,x_{2}=6\)
The real solutions of the equation \((2x-3)^2=81\) are \(x=-3\) and \(x=6\).
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The Deep Dive
To solve the equation \( (2x - 3)^{2} = 81 \), we start by taking the square root of both sides: \[ 2x - 3 = 9 \quad \text{or} \quad 2x - 3 = -9. \] Now, we solve each equation separately. 1. For \( 2x - 3 = 9 \): \[ 2x = 9 + 3 = 12 \\ x = \frac{12}{2} = 6. \] 2. For \( 2x - 3 = -9 \): \[ 2x = -9 + 3 = -6 \\ x = \frac{-6}{2} = -3. \] Thus, the real solutions of the equation are: \( x = 6, -3. \)

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