Skip to main content
Ch. 5 - Systems and Matrices
Lial - College Algebra 13th Edition
Lial13th EditionCollege AlgebraISBN: 9780136881063Not the one you use?Change textbook
Chapter 6, Problem 11

Verify that the points of intersection specified on the graph of each nonlinear system are solutions of the system by substituting directly into both equations.
y = 3x2
x2 + y2 = 10

Verified step by step guidance
1
Step 1: Identify the system of equations and the points to verify. The system is given by \(y = 3x^2\) and \(x^2 + y^2 = 10\). The points to check are \((-3, 2)\) and \((3, 2)\).
Step 2: Substitute the point \((-3, 2)\) into the first equation \(y = 3x^2\). Calculate \(3(-3)^2\) and check if it equals \(y = 2\).
Step 3: Substitute the point \((-3, 2)\) into the second equation \(x^2 + y^2 = 10\). Calculate \((-3)^2 + 2^2\) and check if it equals 10.
Step 4: Repeat the substitution process for the point \((3, 2)\). First, substitute into \(y = 3x^2\) by calculating \$3(3)^2\( and check if it equals \)y = 2$.
Step 5: Substitute \((3, 2)\) into \(x^2 + y^2 = 10\) by calculating \((3)^2 + 2^2\) and check if it equals 10. If both points satisfy both equations, they are solutions to the system.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
6m
Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Nonlinear Systems of Equations

A nonlinear system consists of two or more equations involving variables raised to powers other than one or multiplied together. Solutions are points where the graphs of the equations intersect. Verifying solutions involves substituting the points into each equation to check if they satisfy both.
Recommended video:
Guided course
3:21
Nonlinear Inequalities

Substitution Method

The substitution method involves replacing one variable with an equivalent expression from another equation. This allows checking if a given point satisfies both equations by direct substitution, confirming whether the point lies on both curves.
Recommended video:
04:03
Choosing a Method to Solve Quadratics

Graph Interpretation of Intersection Points

Intersection points on a graph represent solutions common to both equations in a system. Identifying these points visually helps in understanding where the equations meet, and these points can be tested algebraically to verify their validity as solutions.
Recommended video:
Guided course
04:29
Graphing Equations of Two Variables by Plotting Points