Question

|2x-15|+6x при x= -5


пж​

Answer 1

Ответ:

(2x+y)^2+4x(6x-y)= 4x^2+4xy+y^2+24x^2-4xy= 28x^2 +y^2=28*9+14=252+14=266

(-8x-3y)^2-16x(-x+3y)=64x^2+48xy+9y^2+16x^2-48xy= 80x^2+9y^2=80*4+9*13=320+117=437