Odpowiedzi

2010-03-02T18:34:42+01:00
2(2x+3y-4)-5(x-2y+3x)=4x+6y-8-5x+10y-15x=-16x+16y-8=16*(-2)+16*4-8=-32+64-8=24
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2010-03-02T18:36:05+01:00
2(2x + 3y - 4) - 5(x - 2y + 3x) = 4x+6y-8-5x+10y-15x=-16x+16y-8
-16x+16y-8=-16*(-2)+16*4-8=32+64-8=88
2010-03-02T18:41:11+01:00
4x + 6y - 8 - 5x + 10y - 15x = -11x + 16y - 8

-11 × (-2) + 16 × 4 - 8 = 22 + 20 - 8 = 34