Question

решите уравнение (7+3y-x^2y)*(-2xy)=

Answer 1

Пошаговое:
(7+3y-x2y)⋅(-2xy)=-(7+3y-x2y)⋅2xy=-(7+(3-x2)y)⋅2xy=-(7+y(-x2+3))⋅2xy=-(y(-x2+3)+7)⋅2xy=-(y(-x2+3)⋅2xy+7⋅2xy)=-y(-x2+3)⋅2xy-7⋅2xy=-2yxy(-x2+3)-14xy=-14xy-2yxy(-x2+3)

Answer 2

7+3у-2х^у    2х^у-3у-7  2х^-3-7=2х^-10 х=8