### Concept (1)

One tool used throughout Algebra, Trigonometry, and Calculus is a graphing calculator. One thing using a graphing calculator is helpful for is solving systems of equations. We can solve systems of linear equations by using a graphing calculator and matrices. We can also solve systems of nonlinear equations by using a graphing calculator to graph their equations and find the intersection.

### Sample Problems (4)

Need help with "Using the Calculator" problems? Watch expert teachers solve similar problems to develop your skills.

Use the calculator to solve:

0 = x³ − 4x + 7
###### Problem 1
How to use the calculator to solve an equation.

Use the calculator to solve the system:

y = x² − 3x − 4
y = 2x + 1
###### Problem 2
How to use the calculator to solve a system of equations by two methods.

Use the calculator to solve the system:

x − 3y = -7
2x + 2y = 10
###### Problem 3
How to use the calculator to solve a system of linear equations using an augmented matrix.

Use the calculator to solve:

10
₇C₃
₅P₂
8!
###### Problem 4
How to find difficult operations on the calculator.