Respuesta :
First substitute f for 1 a number and a variable together means multiplication. 4-2*1
Multiplication is first so (2*1=2) which brings us to 4-2.
Subtract 4-2=2
Answer: 2
Multiplication is first so (2*1=2) which brings us to 4-2.
Subtract 4-2=2
Answer: 2