Wykonaj dzialania : a)6(x-4)-2 b)2(x+1)-3(x-1) c)-3(y-2)+4(y+2) d)5(x-y-1)-4(x+2) e)2(3a+b)-2(a-b) F)1/2(4x-4)-2x g)5a(a-3)-3a(a-5) Prosze o rozpisanie wszystkiego!!!!!!!
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a)6(x-4)-2 = 6x - 24 - 2 = 6x - 26
b)2(x+1)-3(x-1) = 2x + 2 - 3x + 3 = -x + 5
c)-3(y-2)+4(y+2) = -3y + 6 + 4y + 8 = y + 14
d)5(x-y-1)-4(x+2) = 5x - 5y - 5 - 4x - 8 = x - 5y - 13
e)2(3a+b)-2(a-b) = 6a + 2b - 2a + 2b = 4a + 4b = 4(a + b)
f)1/2(4x-4)-2x = 2x - 2 - 2x = -2
g)5a(a-3)-3a(a-5) = 5a² - 15a - 3a² + 15a = 2a²
a) 6(x-4)-2 =
6x-24-2=
6x-26
b) 2(x+1)-3(x-1)=
2x+2-3x+3=
-x+5
c) -3(y-2)+4(y+2)=
-3y+6+4y+8=
y+14
d) 5(x-y-1)-4(x+2)=
5x-5y-5-4x-8=
x-13-5y
e) 2(3a+b)-2(a-b)=
6a+2b-2a+2b=
4a+4b
f) ½(4x-4)-2x=
2x-2-2x=
-2
g) 5a(a-3)-3a(a-5)=
5a²-15a-3a²+15a=
2a²
Mam nadzieję, że pomogłam... :D