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2(a+b) = 2a + 2b
-5(m-n) = -5m + -5*(-n) = -5m + 5n
-6(-c-d) = -6*(-c) + -6*(-d) = 6c + 6d
-3(x+y) = -3x -3y
b)
3x-4(y-3x) = 3x - 4y + (-4)*(-3x) = 3x -4y + 12x = 15x - 4y
8(-12x + y) + 12x = 8*(-12x) + 8y + 12x = -96x + 12x + 8y = -84x + 8y
c)
2-10 (2y-x) + 2 (-y+4x) = dla x= -1, y= - 0,1
2-10*(2*(-0,1) -(-1)) + 2*(-(-0,1) + 4*(-1)) =
2-10*(-0,2+1) + 2*(0,1 - 4) =
2-10*(0,8) + 2*(-3,9) =
2 -8 -7,8 =
2 - 15,8 =
-13,8
-2 (-3x - y) - 3x (1+y) = dla x= 2, y= 1/4
-2*(-3*2 - 0,25) - 3*2*(1+0,25) =
-2*(-6-0,25) - 6*(1,25)=
-2*(-6,25) - 7,5 =
12,5 - 7,5 =
5
-5m + 5n
6c + 6d
-3x - 3y
Zad 2
3x - 4y + 12 x = 15 x - 4y
-96x + 8y + 12x= -86x + 8y
Zadania trzeciego nie wiem :D