Question

помогите пожалуйста очень срочно нужно​

Answer 1

1.

а) $u^{3}-27w^{3}$

$u^{3}-3^{3}w^{3}$

$u^{3}-(3w)^{3}\\(u-3w)*(u^{2}+u*3w+(3w)^{2})\\(u-3w)*(u^{2}+3uw+9w^{2})$

б)

$x^{6}+z^{2} \\x^{3*2}+z^{3} \\(x^{2}+z)*((x^{2})^{2}-x^{2}z+z^{2})\\(x^{2}+z)*(x^{4}-x^{2}z+z^{2})$

2.

а) $(a-0,3b)*(a^{2}+0,3ab+0,09b^{2})$

$a^{3}-0,3^{3}*b^{3} \\a^{3}-(\frac{3}{10})*b^{3} \\\\a^{3}-\frac{27}{1000}b^{3}$

б) $(4x+1)(16x^{2}-4x+1)$

$(4x)^{3}+1^{3}\\64x^{3} +1$

3.

а) $\frac{3a^{2}-3ab+3b^{2}}{a^{3}+b^{3}}$

$\frac{3(a^{2}-ab+b^{2})}{(a+b)*(a^{2}-ab+b^{2})}$

$\frac{3}{a+b}$

б) $\frac{1-x^{3}y^{3}}{xyz-z}$

$\frac{(1-xy)*(1+xy+x^{2}y^{2})}{z(xy-1)}$

$\frac{-(xy-1)*(1+xy+x^{2}y^{2})}{z(xy-1)}$

$\frac{-(1+xy+x^{2}y^{2})}{z}$

$-\frac{1+xy+x^{2}y^{2}}{z}$