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(2x+y+1)(2x+y+1)=
4x²+2xy+2x+2xy+y²+y+2x+y+1=
4x²+4xy+4x+y²+2y+1
2. Ile wynosi połowa liczby 4^30 + 4^30 + 4^30 + 4^30 ?=
4*4^30=4^ 31
połowa = 1/2*4^31=2^ (-1) *(2²)^ 31=2^ (-1)*2^ 62=2^61
3. Oblicz log50 + log 2.= log przy podstawie 10 z liczby (50*2)=
log 10 100=x
10^x=10²
x=2