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Matrix

Quadratic Equations

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Quadratic Equations This is what a "Standard" Quadratic Equation looks like: •The letters a, b and c are coefficients (you know those values). They can have any value, except that a can't be 0. •The letter "x" is the variable or unknown (you don't know it yet) Here is an example of one: The name Quadratic comes from "quad" meaning square, because the variable gets squared (like x2). It is also called an "Equation of Degree 2" (because of the "2" on the x) More Examples of Quadratic Equations: In this one a=2, b=5 and c=3 This one is a little more tricky: •Where is a? In fact a=1, as we don't usually write "1x2" •b = -3 •And where is c? Well, c=0, so is not shown.

inverse matrix method

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Inverse Matrix Method The inverse matrix method is a method of solving an unsolved system of equations by using a matrix and the formula AA=I and AX= B to find the solution to the variables where I is the identity matrix. Start with your unsolved linear system. You must make sure that you have an equal number of variables and equations or the method won?t work. Line the coefficients up in a matrix by system. For example, If your systems were: -1x + 1y + 3z = 2 -1 1 3 x 2 2 x + 1y +2z = 2 then you would arrange it as 2 1 2 y 2
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