Multiply one or both equations by numbers so that the coefficients of one variable become opposites (e.g., -5ynegative 5 y Add the equations to eliminate that variable.
The Home Control Work №2 (Домашняя контрольная работа №2) for 9th-grade algebra by Mordkovich typically focuses on (Системы уравнений). General Guide for Solving Home Control Work №2 Solve Systems Graphically : Plot the graph for each equation (e.g., a circle , a parabola , or a line The solutions are the coordinates of the intersection points. Substitution Method (Метод подстановки) : Isolate one variable (e.g., from a linear equation). Multiply one or both equations by numbers so
Solve for that variable, then plug it back to find the second coordinate. : Example Topic: Substitution Method If your system is:
: Platforms like Infourok provide previews of the control work tasks, including graphical and substitution problems. Example Topic: Substitution Method If your system is: including graphical and substitution problems.
x2+(5−x)2=13x squared plus open paren 5 minus x close paren squared equals 13
Substitute this expression into the second equation to get a single-variable quadratic or linear equation.
: You can find step-by-step video solutions for specific problems (from №1 to №10) on platforms like VK Video - GDZ.ru which covers Variant 2.