Wyrażenia algebraiczne ;/
1. Przekształć iloczyny na sumy ;
a) 1/2 (3a-2)
b)2/3 (1,5 + 3x)
c) k (3 l + 2 m
d) -p (r-5s)
2. Wykonaj działania
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 (4 x -4 ) - 2x
g) x (x -1) - 3 (x do potegi drugiej - x )
h) 5a ( a-3 ) - 3a (a-5)
i) 3x (x + 1/3 y ) - 2y ( 1/2 x - 1/2 )
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zad 1
a) 1/2 ( 3a-2)= 1 1/2 a - 1
b) 2/3 ( 3/2 + 3 x) = 1 + 2x
c) k ( 3l + 2 m ) = 3 kl + 2 km
d) -p (r - 5s) = - pr + 5 ps
zad 2
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 - 2= x - 5y - 7
e) 2 (3a + b ) - 2 (a-b)= 6a + 2b - 2a + 2b = 4a + 4b
f) 1/2 (4 x -4 ) - 2x = 2x - 2 - 2x= - 2
g) x (x -1) - 3 (x do potegi drugiej - x ) = x2 - x - 3 x2 + 3x= -2 x2 + 2x
h) 5a ( a-3 ) - 3a (a-5) = 5 a2 - 15 a - 3 a2 + 15a = 2 a2
i) 3x (x + 1/3 y ) - 2y ( 1/2 x - 1/2 ) = 3 x2 + xy - xy + y= 3 x2 + y
x2- to jest x do potęgi 2
x3- to jest x do potęgi 3
licze na naj :D
zad 2
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 - 2= x - 5y - 7
e) 2 (3a + b ) - 2 (a-b)= 6a + 2b - 2a + 2b = 4a + 4b
f) 1/2 (4 x -4 ) - 2x = 2x - 2 - 2x= - 2
g) x (x -1) - 3 (x do potegi drugiej - x ) = x2 - x - 3 x2 + 3x= -2 x2 + 2x
h) 5a ( a-3 ) - 3a (a-5) = 5 a2 - 15 a - 3 a2 + 15a = 2 a2
i) 3x (x + 1/3 y ) - 2y ( 1/2 x - 1/2 ) = 3 x2 + xy - xy + y= 3 x2 + y