Oblicz:
a) 5(-1,8x² - 4 ) - 2(5x² - 0,6)
b) -3(8x - 3) + 4(4x + 7)
c) 8(7 + 2x) - (x - 12)
d) 9(5 - 4x) - 6(1+2x)
e) 4(2x - 3) - (x - 2 ) - 3(x+3)
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a) 5(- 1,8x^{2} - 4) - 2( 5x^{2} - 0,6)=
-9x^{2} - 20 - 10x^{2} + 1,2=
- 19 x^{2} - 18,8
b) -3 ( 8x -3) + 4( 4x +7)=
- 24 x + 9 + 16x + 28=
8x + 37
c) 8(7 + 2x) - (x - 12) =
64 + 16x -x + 12 =
76 + 15x
d) 9(5 - 4x) - 6(1+2x)=
45 -36x -6 -12x=
39 - 48x
e) 4(2x - 3) - (x - 2 ) - 3(x+3)=
8x - 12 - x+ 2 - 3x - 3 =
4x -13