This video is to supplement the previous video on "sqrt(ab)=sqrt(a)sqrt(b) is false if a and b are negative. Check out the video here:    • Hate to be that guy but I need the ex...  
Here are two common things that we cannot do in math, otherwise we will get a contradiction (i.e. some nonsensical results). The first one is "we can't divide by 0" and the second one is "we can't split the square root of a product of two negative numbers". To master your math fundamental skills, subscribe to @bprpmathbasics for more math lessons and tutorials.

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