If f(x)= x²+5x+7, evaluate f(2) -f(-1)+f(⅓).
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Step-by-step explanation:
f(2)= 4+10+7=21, by taking x=2 and substituting in f(x)
f(-1)= 1-5+7=3, taking x=-1 and substituting in f(x)
f(1/3)= 1/9+5/3+7=237/27
21-3+237/27=18+237/27=(486+237)/27=723/27=26.78
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