Question

f(x)=2(x)+x+x+4
if(x)=(-1)​

Answer 1

$f(x) = 2x + x + x + 4 \\ f( - 1) = - 2 + ( - 1) + ( -1 ) + 4\\ f(-1)=-4+4 \\ f( - 1) = 0$

Answer 2

Answer:

if (x)= -1

f (-1)=2 (-1)+(-1)+(-1)+4

-2-1-1+4=-4+4

-4+4=0