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TOPIC: OPERATION with function

 1.operation of difference
 f(x) =x+5
g(x) = x-8


Sagot :

So since it includes subtraction then
f(x)-g(x)
x+5-x+8
13

As you notice in the second equation, the signs are inverted. It is because it's the rule in subtracting polynomials. The - sign becomes + and the within the equation are multiplied to -1 or inverted