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Arithmetic with Polynomials and Rational Expressions Feedback Rational Expressions Rational Expressions

Factoring + Rational Expressions

IMG_20130331_171842 IMG_20130331_172201

What’s the fastest way of helping these students?

Thanks to Anna for the submissions.

 

Categories
Arithmetic with Polynomials and Rational Expressions Rational Expressions Uncategorized

Multiplying fractions

In case you’re having trouble reading the kid’s work, and because the top of the question is cut off, I’m going to reproduce the problem in text below the image:

Question: What is the product of \frac{x^2-1}{x+1} and \frac{x+3}{3x+3} ?

Answer: \frac{3x^2-3}{3x+3}*\frac{x+3}{3x-3}

\frac{3x^2+9}{9x+9} \rightarrow \frac{1x^2+3}{3x+3}

 

The usual: What does he know, what doesn’t he know, and what would you do next?

Categories
Algebra 2 Rational Expressions

Not-so-simple simplifying

What’s the student thinking, and how can we help?

Rational_expressions