Multiplying or dividing by a negative reverses the order of numbers on the number line, so the inequality symbol must reverse to keep the statement true.
Duration of the online course: 9 hours and 22 minutes
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Build algebra confidence fast with a free online course: variables, equations, graphs, matrices, and word problems, plus practice exercises for mastery.
Algebra stops feeling like a set of random rules when you understand what each symbol is doing and why every step is allowed. This free online course is designed to help you move from uncertainty to clarity by building strong fundamentals and then connecting them to the kinds of problems you meet in school, entrance exams, and everyday reasoning. You will learn to translate ideas into expressions, interpret variables correctly, and work through solutions in a way that is organized, checkable, and repeatable.
You will strengthen core skills like using the distributive property, solving equations and inequalities, and handling the special rule changes that happen when you multiply or divide by a negative number. From there, the course expands into two-variable relationships and lines, helping you see how algebra links to geometry through slope, rate of change, and equations determined by points. As you progress, you will gain the ability to solve systems using different methods and choose the approach that best fits the problem, whether you are working with standard forms or visual solution regions.
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9 hours and 22 minutes of online video course
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Why do you reverse an inequality sign when multiplying or dividing by a negative number?
Multiplying or dividing by a negative reverses the order of numbers on the number line, so the inequality symbol must reverse to keep the statement true.
How do you find the equation of a line through two points?
Calculate the slope m=(y2-y1)/(x2-x1), then use y-y1=m(x-x1). Convert to slope-intercept form if needed.
What does a negative discriminant mean for a quadratic equation?
A negative discriminant means the quadratic has no real roots; it has two complex conjugate roots.
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