Distance Calculus @ Roger Williams University is in full operation during COVID-19 Emergency

The Primitives of Precalculus
by Robert Curtis

Rational Polynomial Equations - Solve By Cross Multiplication

  • P6: Rational Polynomial Functions:
    • P6.3: Rational Polynomial Equations:
      • P6.3.b: Solve By Cross Multiplication:
        • P6.3.b.1: ChalkTalk Help Movie
        • P6.3.b.2: LiveMath Notebook
        • P6.3.b.3: LiveMath Help Movie
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Distance Calculus Courses Frequently Asked Questions
Math 213: Calculus I (4 credits)
Math 214: Calculus II (4 credits)
Math 351: Multivariable Calculus (4 credits)
(same as Calculus III, Calculus IV, Vector Calculus)
Math 317: Differential Equations (3 credits)
Math 331: Linear Algebra (3 credits)
Math 315: Probability Theory (3 credits)
Calculus-Based Statistics
Math 207: Applied Calculus (3 credits)
Survey of Calculus • Liberal Arts Calculus
< Engineering Calculus I
Math 136: Precalculus (4 credits)
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Distance Calculus - Student Reviews

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Date Posted: Feb 28, 2020
Review by: Teddy M.
Courses Completed: Precalculus, Calculus I
Review: Pros: once you get going, you can go really fast. The visual textbook is pretty cool. The instructors were very responsive. Cons: the movies are great, but the software crashes more than it should. Sometimes it is just a hassle doing things in the software instead of on paper, but once I got used to the software, it was ok.
Transferred Credits to: Texas Christian University



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Date Posted: Dec 9, 2019
Review by: Louisa A.
Courses Completed: Calculus I
Review: My microeconomics class required college-level calculus as a prerequisite, and I didn't want to wait until next year to take the class. So, I took DC's Calculus I class over the summer, so I could register for econ when I got back to school this fall. I actually think I got more help taking the class online than I would have in the huge lecture classes here. Prof. Curtis was really clear in explaining concepts and talking me through the topics that I was having trouble with. It took me about 10 weeks to finish the class, which didn't seem too long and didn't feel rushed. My friends who are in calculus now, trying to finish the prereq, are pretty jealous!



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Date Posted: Mar 17, 2020
Review by: Rebecca M.
Courses Completed: Calculus II, Multivariable Calculus
Review: Fantastic courses! I barely made it through Cal 1, and halfway through Cal 2 I found this program. I took Cal 2 and then Multivariable and I just loved it! SOOOOOOO much better than a classroom+textbook class. I highly recommend!
Transferred Credits to: Tulane University