Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
- Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
- Guided Notes →One page your students fill in and keep.
- Exit Ticket →Three items at the end of class. No student accounts.
- Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
- Homework →Assign practice; it grades itself.
"N 706. Apply properties of matrices and properties of matrices as a number system"
"N 705. Multiply matrices"
"A 604. Solve systems of two linear equations"
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"N 706. Apply properties of matrices and properties of matrices as a number system"
"N 705. Multiply matrices"
"A 604. Solve systems of two linear equations"
What you'll learn
- Use the determinant `ad - bc` of a `2x2` matrix to decide whether the matrix has an inverse and, when it does, construct that inverse
- Compute `det(A) = ad - bc`, including matrices with negative entries, reading `|A|` as the determinant rather than an absolute value
- Explain why a determinant of zero means no inverse exists, and give "no inverse" as the answer in that case
- Construct the inverse of an invertible `2x2` matrix by swapping, sign-flipping, and scaling by `1/det(A)`
Slides
Step through the lesson, or watch it as a narrated video
Slides
In development
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