ЛЮДИ ПОМОГИТЕ ПОЖАЛУЙСТА С ПРИМЕРАМИ!!!!!!!! ДАЮ 30 БАЛЛОВ
[latex]a)left(2a-5 ight)^2=left(2a ight)^2-2cdot :2acdot :5+5^2=4a^2-20a+25 \ b)left(5+8m ight)^2=5^2+2cdot :5cdot :8m+left(8m ight)^2=25+80m+64m^2 \ 7)+ left { {{4x-3y=7 |*2} atop 5x+2y=26 |*3}} ight. \ 2(4x-3y)+3(5x+2y)=2*7+3*26 \ 23x=92 \ x=4 \ 4(4)-3y=7 \ y=3 \ OTBET : (4 ; 3) [/latex]
[latex]a)left(2a-5 ight)^2=left(2a ight)^2-2cdot :2acdot :5+5^2=4a^2-20a+25 \ b)left(5+8m ight)^2=5^2+2cdot :5cdot :8m+left(8m ight)^2=25+80m+64m^2 \ 7)+ left { {{4x-3y=7 |*2} atop 5x+2y=26 |*3}} ight. \ 2(4x-3y)+3(5x+2y)=2*7+3*26 \ 23x=92 \ x=4 \ 4(4)-3y=7 \ y=3 \ OTBET : (4 ; 3) [/latex]