Jawabanmu

2014-08-14T19:51:16+07:00
1. (x+2)(x+8)
= x²+8x+2x+16
=x²+10x+16
2. (2x+3)(x-2)
=2x²-4x+3x-6
=2x²-x-6
3.(3x-4)(x+3)
=3x²+9x-4x-12
=3x²+5x-12
2014-08-14T19:55:39+07:00
1. (x+2) (x+8) = x.x + x.8 + 2.x + 2.8 
                     = x² + 8x + 2x + 16 = x² +10x + 16
2. (2x-3) (x-2) = 2x² - 4x + 3x + 6 = 2x² - x + 6
3. (3x-4) (x+3) = 3x² + 9x - 4x - 12 = 3x² + 5x - 12