## Determinant | Algebra | Chegg Tutors

A determinant is a scalar number that is calculated from a square matrix. A determinant is different from a matrix in that a determinant has a numerical value, whereas a matrix does not. Determinants play an important role in finding the inverse of a matrix and determining whether systems of linear equations are solvable. There are two ways to write a determinant: “det A” or |A|. The determinant of a 2×2 matrix is the product of the elements on the main diagonal minus the product of the elements off the main diagonal.

|a b|

|c d| = ad – bc

There are numerous formulas for calculating determinants for larger matrices.

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About Mohammad P., Algebra tutor on Chegg Tutors:

UCLA, Class of 2014

Applied Mathematics / BS in Nuclear Physics 2007 Qom University major

Subjects tutored: Geometry (College Advanced), Basic Math, SAT II Mathematics Level 2, Calculus, Algebra, Physics, Trigonometry, Pre-Calculus, ISEE (math), Pre-Algebra, ACT (math), SAT II Mathematics Level 1, Linear Algebra, and Geometry

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I have been tutoring and teaching math and physics since 2003 in all levels from middle school up to the college level. My specialty is high school and college math. I have been working on Instaedu/Chegg since 2012 and I have had more than 6000 lessons. I conducted many group study sessions and workshops at El Camino College from 2010 to 2012 and I worked for private tutoring companies such as Tutor Doctor, Mathnasium and Kumon.******* If you see a red circle next to my name, please message me and I will get back to you asap.

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