[技巧篇

[@SHIN-hy4lr]

我會用synthetic division

[@seliekwok2698]

Hello 如果條數有remainder 好似2017Q14 有冇辦法做快啲？謝謝

[@adamwan7640]

Morning Fung sir, could help to solve 16x5-20x3+5x-1=0? Many Thanks!

[@pipperlong]

Like!!!!

[@ronalddefantasticworld]

good job ,pro

[@liulingfung3214]

其實仲可以用vieta's thm 即係你知其中一個root係-1 而成個polynomials嘅sum of roots 係5/4 甘(-k/4)+ (-1) = 5/4

[@Tom-ih7hj]

KOOPA?

[@loki11988]

sum of roots = -b/a 當你樓上個cubic 既root係 x1,x2,x3 x1+x2+x3 = -b/a = 5/4 .....(1) 咁你知x3 = -1 (是但, 好睇啲) 你之後個4x^2 +kx -8 既root都重係 x1,x2 咁 x1+x2 = sum of root = -k/4 .....(2) put (2) into (1) -k/4 + (-1) = 5/4

[@lkc9877]

勁。。。但係唔係確定長除無step分？

[@KFungMath]

Marking 完全冇長除呢個step 重點係factorize 條 polynomials 啊 影片裡已是full steps 啊

[@Tom-ih7hj]

做Polynomials? 唔使用長除架,用program 3秒搵哂3個roots +必岩,如果佢冇比1 你,你要試3個

[@no-lr5nr]

當你要做長題目個陣…

[@chemlo]

長除法有多難？？

[@AaAAaA-mv7nt]

麻煩ze 冇話難ge

[@張劍謙]

啱呀 搵asymptote 分母分子都十幾次你咪題題長除囉😂

[@diannetan4958]

唔該可不可以教completing square method? Thx~~

[@KFungMath]

之前拍過啊 here you are kzbin.info/www/bejne/bGncnXinbrykmNE

[@diannetan4958]

K Fung 數學教室 - DSE 數學攻略 i just watched it thank you🖤