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Answer to Question #20717 in Trigonometry for Kristen Woods

Question #20717
Find and simplify a) f(a), b) f(a + h) and f(a+h)-f(a) / h , h≠0 using the given function.

f(x)=x^2-2x+3
Expert's answer
a)f(a)=a^2-2a+3
b)f(a+h)=(a+h)^2-2(a+h)+3=a^2+2ah+h^2-2a-2h+3;
f(a+h)-f(a) / h=a^2+2ah+h^2-2a-2h+3-(a^2-2a+3)/h;

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