Simplifying rational expression

Learn how to simplify rational expressions. A rational expression is an expression in the form of a fraction where the numerator and/or the denominator are/is an algebraic expression. To simplify a rational expression, we factor completely the numerator and the denominator of the rational expression and cancel out terms common to both the numerator and the denominator of the rational expression.
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[aakashkarajgikar]

1:36 Did you know I actually made up a new unit for having a 0 in the denominator? I would let "F = 1 / 0". Just saying! It is just like "i = sqrt(-1)" So now, 2 imaginary units!