Struggling with math homework? An expert instructor from Khan Academy helps you work your way through the challenges of solving more difficult rational inequalities. Provides fantastic animated examples that demonstrate helpful tips, overcoming common problems with inequalities, and "simplifying" the problems of inequality simplification! Covers tricky complications such as swapping inequalities, understanding constraints, working with negative numbers, and working with zeros in equations. Points out some useful warning signs that your are straying from the right answer during a math exam.
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How To: Find the area of a parallelogram using geometry

How To: Find and sketch the domain of a multivariable function

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