zad.1 zredukuj wyrazy podobne.
a) -2a + 5a =
b) 4b - 3 (2 - b) =
c) -15 + 20d +12 - 18d =
d) 4(-2+y) - (4y-5) + 4 =
zad.2 Wykonaj
a(2+x) =
b(b-a) =
a(a+a2)=
b(x-y)=
zad.3rozwiąż równanie
2x+6=12
3y -4 =17
4-2x =10
x+6 = 2x + 3
2x + 4 =4 -3x
3x + 11 = 6x - 1
2(x+1) = 5
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zad.1 zredukuj wyrazy podobne.
a) -2a + 5a = 3a
b) 4b - 3 (2 - b) = 4b-6+3b = 7b-6
c) -15 + 20d +12 - 18d = 2d-3
d) 4(-2+y) - (4y-5) + 4 =-8+4y -4y+5 =-3
zad.2 Wykonaj
a(2+x) = 2a+ax
b(b-a) = b²-ab
a(a+a2)= a²+2a² =3a²
b(x-y)=bx-by
zad.3rozwiąż równanie
2x+6=12
2x=6
x=3
3y -4 =17
3y=21
y=7
4-2x =10
-2x=6
x=-3
x+6 = 2x + 3
-x=-3
x=3
2x + 4 =4 -3x
5x=0
x=0
3x + 11 = 6x - 1
-3x=-12
x=4
2(x+1) = 5
2x+2=5
2x=3
x=1,5
a) -2a + 5a =a
b) 4b - 3 (2 - b) =4b-6+3b=7b-6
c) -15 + 20d +12 - 18d =2d-3
d) 4(-2+y) - (4y-5) + 4 =-8+4y-4y+5=-3
2.
a(2+x) =2a+2x
b(b-a) =b²-ab
a(a+a2)=a²+a³
b(x-y)=bx-by
3.
2x+6=12
2x=12-6
2x=6/:2
x=3
3y -4 =17
3y=17+4
3y=21/:3
y=7
4-2x =10
-2x=10-4
-2x=6/(-2)
x=-3
x+6 = 2x + 3
x-2x=3-6
-x=-3/:(-1)
x=3
2x + 4 =4 -3x
2x+3x=4-4
5x=0/:5
x=0
3x + 11 = 6x - 1
3x-6x=-1-11
-3x=-12/;(-3)
x=4
2(x+1) = 5
2x+2=5
2x=5-2
2x=3/:2
x=3/2
x=1 1/2