Welcome back to rational expressions this week in Pre-Calc 11 we learnt  how to multiply and subtract rational expressions! I chose this topic because multiplying and dividing rational expressions is the foundation of our current unit. Lets first try a multipication question!

When dealing with rational expressions our first step is to always see if our expression is factorable and if you remember from our previous blog it is recommend to put brackets around the numbers you have checked for factors.

And right now it would be a good time to set our non-permissible values by checking the bottom.

Next we cross out the shared binomials from the top and bottom. Leaving us with 35/3x.

Now let’s try a division rational expression question. As always the first step we take when dealing with rational equations is too factor and, next you say we should cancel out right? Wrong just like a normal fraction division question we have to turn it into a multiplication question.

Now that we flipped it we can cancel out and also a good time to find your non-permissible.

Leaving us with this.

Tada you learnt how to multiply and divide rational equations! Come back next week to finish off rational expressions!