Jawabanmu

2014-09-06T17:44:43+07:00
1 ) 2a (5a-4b+7ab)
   =10a2 (2 = kuadrat ) -8ab+14a2b(2= kuadrat)

2014-09-06T17:47:01+07:00
1. 10a^2-8ab+14a^2 b
2. x^2+9x+20
3. 2y^2-4y-15
4. 25y^2+10y-24
5. 49x^2-16y^2