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Sketch the region bounded by the graphs of the equation \[ \begin{array}{l}f(x)=x^{2}+6 x \\ g(x)=x+6\end{array} \]

Ask by Deleon Cook. in the United States
Mar 12,2025

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To sketch the region bounded by \( f(x) = x^2 + 6x \) and \( g(x) = x + 6 \), find their intersection points by solving \( x^2 + 6x = x + 6 \), which gives \( x = -6 \) and \( x = 1 \). Then, plot both functions and shade the area between them from \( x = -6 \) to \( x = 1 \).

Solución

To sketch the region bounded by the graphs of the equations \( f(x) = x^2 + 6x \) and \( g(x) = x + 6 \), we need to find the points of intersection between the two graphs. To find the points of intersection, we set the two equations equal to each other and solve for \( x \): \[ x^2 + 6x = x + 6 \] Simplifying the equation: \[ x^2 + 5x - 6 = 0 \] Now, we can solve this quadratic equation to find the values of \( x \) where the two graphs intersect. Solve the quadratic equation by following steps: - step0: Solve by factoring: \(x^{2}+5x-6=0\) - step1: Factor the expression: \(\left(x-1\right)\left(x+6\right)=0\) - step2: Separate into possible cases: \(\begin{align}&x-1=0\\&x+6=0\end{align}\) - step3: Solve the equation: \(\begin{align}&x=1\\&x=-6\end{align}\) - step4: Rewrite: \(x_{1}=-6,x_{2}=1\) The points of intersection between the two graphs are \( x = -6 \) and \( x = 1 \). Now, we can sketch the region bounded by the graphs of the equations \( f(x) = x^2 + 6x \) and \( g(x) = x + 6 \) by plotting the two graphs and shading the region between them.

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Mind Expander

To sketch the region bounded by the graphs of the equations \( f(x) = x^2 + 6x \) and \( g(x) = x + 6 \), we first need to find the points of intersection. 1. Set \( f(x) = g(x) \): \[ x^2 + 6x = x + 6 \] Simplifying this, we get: \[ x^2 + 5x - 6 = 0 \] Factoring, we find: \[ (x + 6)(x - 1) = 0 \] This gives us the intersection points \( x = -6 \) and \( x = 1 \). 2. To identify the bounded region, we can evaluate the functions at a point between the intersections, say \( x = 0 \): \[ f(0) = 0^2 + 6 \cdot 0 = 0 \] \[ g(0) = 0 + 6 = 6 \] Since \( f(0) < g(0) \), the parabola \( f(x) \) lies below the line \( g(x) \) between \( x = -6 \) and \( x = 1 \). Now that we know \( f(x) \) is below \( g(x) \) in the interval \( [-6, 1] \), we can sketch the graphs: - The graph of \( f(x) = x^2 + 6x \) is a parabola that opens upwards, with its vertex located at \( x = -3 \). - The graph of \( g(x) = x + 6 \) is a straight line with a slope of 1. Place the intersection points at \( (-6, 0) \) and \( (1, 7) \) on the graph. The region bounded by these two curves will be closed off by the parabola from below and the line from above, forming a distinct shape on the graph between these x-values. Don't forget to shade the area between these two curves to represent the bounded region!

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