Jawabanmu

2014-08-25T14:48:46+07:00
(2x-3)(x+5)
= 2x(x+5) -3(x+5)
= 2x²+10x -3x-15
=2x²+7x-15

2014-08-25T15:11:57+07:00
=2x(x+5)-3(x+5)
=2x²+10x-3x-15
=2x²+7x-15