Question

Find and simplify the expression if

f left parenthesis x right parenthesis equals x squared minus f(x)=x2−2.

​f(5+​h)−​f(5​)=

Answer 1

10h +h^2

Explanation:

Put the function arguments where x is and do the algebra.

f(5 +h) -f(5)

= ((5+h)^2 -2) -(5^2 -2)

= (25 +10h +h^2 -2) -(25 -2)

= 10h +h^2