Question

Daca x+y+z=17,calculati:

a) 5xX +5xy+5xz=

b) 13xX+13xY+13xZ-1313

c)882-3x(7xX+7xY+7xZ)



AJUTOR VA ROG MULT!!

Answer 1

a) 5xX +5xy+5xz= 5(x+y+z)=5x17=85

b) 13xX+13xY+13xZ-1313 =13(x+y+z)-1313=13x17-1313=221-1313=-1092

c)882-3x(7xX+7xY+7xZ)=882-3x7(x+y+z)=882-21x17=882-357=525

Answer 2

$a)~5x+5y+5z=5(x+y+z)=5*17=85. \\ \\ b)~13x+13y+13z-1313=13(x+y+z-101)=13(17-101)= \\ =13*(-84)=-1092. \\ \\ c)~882-3(7x+7y+7z)=882-3*7*(x+y+z)=882-21*17= \\ =882-357=525.$