Question

Помогите срочно пожалуйста ! ​

Answer 1

Ответ:

$25x^{13}y^6=5x^7y\cdot \boxed{5x^6y^5}\\\\\\\underbrace{(2a^2b)^2}_{4a^4b^2}\cdot \, \boxed{-2a^5b^8}=-8a^9b^{10}\\\\\\-x^9y^5=\boxed{-2xy^3}\cdot \dfrac{1}{2}x^8y^2\\\\\\\boxed{\ ^}:(2x^9y)^2=x^2y\ \ \to \ \ \ \dfrac{\boxed{4\, x^{20}\, y^3}}{4\, x^{18}y^2}=x^2y\\\\\\(2b^3)^2\cdot (\, \boxed{\ ^}\, )^2=100\, b^8\ \ \ \to \ \ \ 4b^6\cdot \boxed{25b^2}=100\, b^8\ \ ,\ \ 4b^6\cdot (\, \boxed{5b}\, )^2=100\, b^8$

$\star \ \ x^{m}\cdot x^{n}=x^{m+n}\ \ ,\ \ \ x^{m}:x^{n}=x^{m-n}\ \ \star$