Question

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 !

Answer 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 = s⁴-3s³-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

Answer 2

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