Odpowiedzi

2009-12-19T19:22:32+01:00
A) (x+1)(x²-x+1) = x³-x²+x+x²-x+1 = x³+1

b)(s-2)(s³-s²+s-1) = s⁴-s³+s²-s-2s³-2s²-2s+2 = s⁴-3s³-s²-3s+2

c)(ab+1)(a+b+ab+1) = a²b+ab²+a²b²+ab+a+b+ab+1 =
= a²b+ab²+a²b²+2ab+a+b+1
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2009-12-19T19:25:55+01:00
A)
(x+1)(x²-x+1)=
=x³-x²+x+x²-x+1 = x³+1

b)
(s-2)(s³-s²+s-1)=
= s⁴-s³+s²-s-2s³-2s²-2s+2 = s⁴-s²-3s+2-3s³

c)
(ab+1)(a+b+ab+1)
= a²b+ab²+a²b²+ab+a+b+ab+1 =
= a²b+ab²+a²b²+2ab+a+b+1
1 5 1