Jawabanmu

2014-02-19T19:49:43+07:00
3x = 3.1 = 3
-5x = -5.1 = -5
x + 7 = 1 +7 = 8
2x-5 = 2.1 - 5 = -3
4x2+25 = 4.1^2 + 25 =29
-2x2+4x-3 = -2.1^2 + 4.1 - 3 = -1
2014-02-19T19:56:21+07:00
3x = 3 x 1 = 3
-5x = -5 x 1 = -5
x+7 = 1+7 = 8
2x-5= (2 x 1)-5 =2 - 5 = -3
4x2 + 25 = (4 x 1) x 2 + 25 = 4 x 2 +25= 8 + 25 = 33
-2x2 +4x-3 = -4 + (4 x 1) -3 = -4+4-3 =-3