8 * (1,4х + 13,6у) + 13 * (0,8х - 0,6у) при х = 1 у =1

Question

8 * (1,4х + 13,6у) + 13 * (0,8х - 0,6у) при х = 1 у =1

Answer 1

8 * (1,4х + 13,6у) + 13 * (0,8х - 0,6у) =\\

=122.6

Answer 2

8 * (1,4х + 13,6у) + 13 * (0,8х - 0,6у)  = 8*1,4x+8*13,6y +13*0,8x -13*0,6y =

 = 11,2x+ 108,8y +10,4x-7,8y = 21,6x+101

при х = 1 у =1  21,6x+101y =122,6