Question

(0,4m-0,5n)^2,(3a+1,3b)^2помогите сросно очень
прошу

Answer 1

1) (0,4m-0,5n)²=$(\frac{2}{5}m-\frac{1}{2}n)^{2}$=$\frac{4}{25}x^{2} -\frac{2}{5}xy+\frac{1}{4} y^{2}$

2) (3a+1,3b)²=$(3a+\frac{13}{10}b)^{2}$=$9a^{2} +\frac{39}{5}ab+\frac{169}{100}b^{2}$