2(x-3y+4z)=2*x-2*(-3y)+2*4z=2x-6y+8z
Добавил решение, см. приложение. Надеюсь я смог вам помочь , и вы это по достоинству оцените. Рад стараться
<span>3√49 * 3√112 / 3√250=3*7*</span>√112/250=21*√56/125=21*√(4*14/5*25)=21*2/5*√14/5=42/5*√14/5
-x+5y=-1
-x=8
y=1
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А)а^2-2аб+б^2-а^2-2аб=-4аб+б^2
Б)4с^2-8с-с^2+8с-16=3с^2-16