1)wykonaj mnozenie i zredukuj wyrazy podobne : a) (x+1)(x²-x+1) b)(s-2)(s³-s²+s-1) c)(ab+1)(a+b+ab+1) z gory dzieki ;) potrzebuje pilnie !

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

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