Zad . 4 Uprość wyrażenia algebraiczne:
a) -7 + 3y + 9 + 2y
b) x - 3x + 2 - 2x - 7
c) -5x + 4y - y - 7x - 9y
d) 4x + 5 - x - 4 + x - 3x
e) 0,5a - 2a + 9 - 0,5a - 11,5
f) -14k + 9k - 13 + k + 3 + 4k
g) -3k + 2m + 5m - 7 + k - m
h) 2x - 4 + 3x -2 i) x - 3y - 2x + 6y j) 2y - 5 - 3y - 4 - 8y - 9
Proszę zapisać np. takim zapisem . : a) -7+3y+9+2y= (-7+9) +(3y+2y) = 2+5y= 5y+2 !!! Pomocy . !!!!
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a) -7 + 3y + 9 + 2y = (-7+9)+(3y+2y) =2+5y
b) x - 3x + 2 - 2x - 7 = (x-3x-2x)+(2-7)= -4x-5
c) -5x + 4y - y - 7x - 9y = (-5x-7x)+(4y-y-9y)= -12x-6y
d) 4x + 5 - x - 4 + x - 3x = (4x-x+x-3x)+(5-4)= 7x+1
e) 0,5a - 2a + 9 - 0,5a - 11,5= (0,5a-2a-0,5a)+(9-11,5)= -2a-2,5
f) -14k + 9k - 13 + k + 3 + 4k=(14k+9k+k+4k)+(-13+3)= 28k-10
g) -3k + 2m + 5m - 7 + k - m= (-3k+k)+(2m+5m-m)-7 = -2k+6m-7
h) 2x - 4 + 3x -2= (2x+3x)+(-4-2)=5x-6
i) x - 3y - 2x + 6y = (x-2x)+(-3y+6y)= -x+3y
j) 2y - 5 - 3y - 4 - 8y - 9= (2y-3y-8y)+(-5-4-9)= -9y-18
a) -7 + 3y + 9 +2y = (-7 + 9) + (3y+2y) = 2 + 5y = 5y + 2
b) x - 3x + 2 - 2x - 7 = (x-3x-2x) + (2-7) = -4x - 5
c) -5x + 4y - y - 7x - 9y = (-5x - 7x) + (4y - y - 9y) = -12x - 6y
d) 4x + 5 - x - 4 + x - 3x = (4x - x + x - 3x) + (5 - 4) = x + 1
e) 0,5a - 2a + 9 - 0,5a - 11,5= (0,5a-2a-0,5a)+(9-11,5)= -2a-2,5
f) -14k + 9k - 13 + k + 3 + 4k=(14k+9k+k+4k)+(-13+3)= 28k-10
g) -3k + 2m + 5m - 7 + k - m= (-3k+k)+(2m+5m-m)-7 = -2k+6m-7
h) 2x - 4 + 3x -2= (2x+3x)+(-4-2)=5x-6
i) x - 3y - 2x + 6y = (x-2x)+(-3y+6y)= -x+3y
j) 2y - 5 - 3y - 4 - 8y - 9= (2y-3y-8y)+(-5-4-9)= -9y-18