Factorising Algebraic Expressions (2 of 3: Non-Monic Quadratic)

[@flam1ngicecream]

WHY WAS I NOT TAUGHT THIS IN HIGH SCHOOL I've just been doing it by inspection/trial and error for years!

[@akaBaye]

do you go to a school in Australia and what year/grade are you in? just curious because I've missed out on a lot​ in previous years due to going to a bad school and wondering when this was supposed to be taught.

[@matthewhan4967]

BAYPALS in ruse this would be yr 8 stuff, but other schools yr 9 or late yr8

[@annabelleriley3600]

Eddie you taught me and my mum maths for my assignment due tomorrow! Thankyou!

[@TienShan3.14]

There is a limitation of the product-sum or the grouping method that Mr. Woo advocates. When leading coefficient * constant, or a * c, is sufficiently large, say over 1000, these methods would be hard to use, example 132x2 -199x +60 = 132x2 - 144x - 55x + 60 = (11x - 12)(12x - 5). Factor pairs of 132 * 60 = 7920 is not a short list.

[@bzhuo5896]

Thank you so much for helping me!

[@R3_dacted0]

The "fill in the blank" methods always confuse me. I prefer to know how things work out, so when I'd get professors that factor by making parenthesis and leaving terms blank to fill in later, I always get lost. It strikes me as relying too much on the pattern/formula to fundamentally understand why it works out the way it does. That's why I will always use the grouping method or quadratic formula if grouping can't work nicely.

[@DanielTsegaye-rf5ip]

you are good

[@afk933]

Best Teacher EVERRRRR!!!!! but i missed the last part on how you got the answer. Its not in part1 either

[@chocolateangel8743]

I just learned about this. It's called the Australian method of factoring. You put the leading coefficient in both (), and do the normal AC. When you multiply the first two terms together, you will be over by a certain factor, so you compensate by dividing one or both factors by the leading coefficient. You will be able to reduce one or both of the factors (depends on the problem).

[@paulmuir7273]

what did the guy say at 0:24? i can't figure it out

[@maratmkhitaryan9723]

some local meme probably

[@NotAFemboy]

I imagine he said something like via contendo or read the content of or something like that as a way of saying to read the actual answer in a way that is kind of a local slang to them.

[@NotAFemboy]

Or maybe one day the teacher said "Feel the content" and it became and inside joke

[@specialschoolacc7397]

0:03