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b)6
c)ułamek 3/2
d)ułamek - 7/16
e)7
f)2
2 - 1 + 1/4 = 1 1/4
b) a(8c-b)
2(8*1/4 - (-1)
16*2 + 2
32 + 2 =34
c) 2(a+b)(a-b)c
2[(2+(-1)](2-(-1)*1/4
4-2*3*1/4
4-6*1/4
4 - 1 1/2 = 2,5
d) 1/4(ab+bc+ac)
e) 4c+b+10a+15
4*1/4 + (-1) + 10*2 + 15
---------------------------- =35/5=7
5
f) (a-2b)(1:c)
---------------- = 2-2*(-1)(1:1/4) / 8 = 2-2*4 / 8 = -5/8
8