2a do 3 potęgi + 2ab + b do 2 potęgi = gdzie a = 1/2 b = 2/3;
a=1/2
b=2/3
2*(\frac{1}{2})^3+3*\frac{1}{2}*\frac{2}{3}+(\frac{2}{3})^2=
2*\frac{1}{8}+1+\frac{4}{9}=\frac{1}{4}+1+\frac{4}{9}=1+\frac{9}{36}+\frac{16}{36}=1\frac{25}{36}
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2a do 4 potęgi - ab + 2b do 2 potęgi = gdzie a = -1 b = - 1/2;
2a^4-ab+2b^2=2*(-1)^4-(-1)*(-\frac{1}{2})+2*(-\frac{1}{2})^2=2*1-\frac{1}{2}+2*\frac{1}{4}=2-\frac{1}{2}+\frac{1}{2}=2