1. 216a^5 b^3 / 36a^3b^2
2.12a^2b-6ab^2/8a-4b
3.14a^2b3/15ac^2 * 20abc^4/6a^2 除以7b^2c^3/9a
4.(3y-2)^2-9y^2-4除以15y-10/6y+4
5.3/5a - 2/3a
6.7/4x-8 - 5/8-4x
7.4/3(3a-2) + 3/2(2-3a)
8.6/2a-5 + 11/4(2a-5) -3
9.12a^2 b-20ab^2 / 2a^2 b^3*15ab^2+25b^3/18a^2-50b^2
10.20a^2 -5b^2/16a^2 c+8abc* 3abc^2/12a^3-12ab+3b^2 除以4ab/18a-9b
Make the letter in the square bracket the subject of the formula
1.P=5(a+b) <b>
2.8=3x-2a / 3x+2a <x>
3.2a=3/4b - 5/c <b>
4.u=開方4v^2 + 9as
要有步驟呀!!!!!!