Math Problem Statement

Graph the following nonlinear system of equations and identify the two solutions.

y=x2+6x−4y=−x+4

Group of answer choices

(1,−3) and (8,−12)

(1,3) and (8,12)

(−1,3) and (−8,12)

(1,3) and (−8,12)

Solution

The graph shows the two equations:

  1. y=x2+6x4y = x^2 + 6x - 4 (blue curve)
  2. y=x+4y = -x + 4 (red line)

From the graph, you can identify the points of intersection, which are the solutions to the system of equations.

Now, let's determine the specific intersection points algebraically to confirm the solutions.

Finding Solutions

To find the intersection points, set the two equations equal to each other:

x2+6x4=x+4x^2 + 6x - 4 = -x + 4

Rearranging gives:

x2+7x8=0x^2 + 7x - 8 = 0

Now, we can use the quadratic formula to solve for xx:

x=b±b24ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

Where a=1,b=7,c=8a = 1, b = 7, c = -8. Let's calculate the solutions for xx.The solutions to the system of equations are:

  1. (1,3)(1, 3)
  2. (8,12)(-8, 12)

Answer Choices

From the options you provided, the correct pair of solutions is:

  • (1, 3) and (-8, 12)

If you have any questions or need further details, feel free to ask!

Related Questions

  1. What are the steps to solve a nonlinear system of equations?
  2. How does the quadratic formula work?
  3. Can you explain how to identify intersection points graphically?
  4. What are some applications of solving systems of equations?
  5. How do you find the vertex of a quadratic function?

Tip: Always check your solutions by substituting them back into the original equations!

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Equations
Systems of Equations

Formulas

Quadratic formula: x = (-b ± √(b² - 4ac)) / 2a

Theorems

Quadratic formula
Intersection of curves

Suitable Grade Level

Grades 9-12