How to simplify a rational expression using factoring

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.
#rationalfunctions #simplifyrationalexpressions

[jerellordonio]

Can you explain how to factor something like 2y^2+7y+3? And 2x^2+10x?

[VictoriaBindi-nyqt]

Can you explain how to factor something like
3x+9÷3

[keithwhiteman]

Where did 3x go? Would numerator (x^2-x-42) factor to (x+7)(x-6)?