You just wrote down a rule but never explained it... Just saying "oh it's a contradiction..."

Clarifying a comment from a previous video regarding sqrt(a)*sqrt(b)=sqrt(ab) The video:    • Why is this way wrong? sqrt(-9)*sqrt(-25),...   ----- Download 10 Precalculus Practice Tests with 200 fully solved problems:   / 1722797-----   This channel is dedicated to creating helpful precalculus tutorials for high school and college students around the world. Thanks to these Patreon members for building this with me! 3Blue1Brown • Allison Lamery • Anthony Hunting • Anyway • Ben Delo • Caoimhe Seymour • charlie lewinski • Corey Rufener • CTAR • David I Miller • Doc Ockey • exchsac • Gramps • Hayden S • huguens nevelus • jappiesaus • Jessica • Johan Renko • Karl Tang-Wang • Manil Trivedi • Mark Pagura • MarkM • Mas • Michael ZHOU • Michelle Liang • Mister Hardware • Mizel Cluett • Nerd • Nicolai Lilly • Ricardo Murillo • Rohan • SaltyFishbutwithDream • Sebastian Correa • Sharnay Ampos • Steven McEwan • Subotai Baghatur • Terry Chang • Tomaz Mevlja • Torbjörn Karlsson • Whoever • Zero • Zhansu (Updated: September 2026   / blackpenredpen  ) ----- #bprpmathbasics #math #algebra #precalculus