Answer:
20
Step-by-step explanation:
Given function f(x)=[tex]\[x^{2}-x\][/tex]
We need to find f(-4) which means we need to find the value of the function when x=-4 .
On substituting x=-4 in the given function:
f(-4)=[tex]\[-4^{2}-(-4)\][/tex]
Square of -4 is 16.
Hence, f(-4)=[tex]\[16+4\][/tex]
=[tex]20[/tex]
Hence the value of the given function f(x)=[tex]\[x^{2}-x\][/tex] when x=-4 is 20.
