12(16a^2+9b^2+12ab)(1/3a-1/4b)简便算法```
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 15:43:16
![12(16a^2+9b^2+12ab)(1/3a-1/4b)简便算法```](/uploads/image/z/3961208-56-8.jpg?t=12%2816a%5E2%2B9b%5E2%2B12ab%29%281%2F3a-1%2F4b%29%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95%60%60%60)
x)3404K3ҶLFIƉ&I5<ٷ6OMHHI*']~
9V=tO-PIqfMtL]{:!rP][uAB5$%bbM52O3/.H̳:!¿pE";1MVK@h P.Ta Ê
12(16a^2+9b^2+12ab)(1/3a-1/4b)简便算法```
12(16a^2+9b^2+12ab)(1/3a-1/4b)
简便算法```
12(16a^2+9b^2+12ab)(1/3a-1/4b)简便算法```
原式=12(4a+3b)^2(1/3a-1/4b)
=(4a+3b)^2(4a-3b)
=(4a+3b)(16a^2-9b^2)
=64a^3-36ab^2+48a^2b-27b^3
12(16a^2+9b^2+12ab)(1/3a-1/4b)
=(4a+3b)^2[12(1/3a-1/4b)]
=(4a+3b)^2*(4a-3b)
=[(4a+3b)(4a-3b)](4a+3b)
=(16a^2-9b^2)(4a+3b)