Markmccartney17 Markmccartney17

24-11-2014
Mathematics

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find f(-2) for the function f(x)=x^2-6

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24-11-2014

you would subitute -2 for x in the equation
f(-2)=x^2-6
PEMDAS so exonents
-2^2-6
negative times a negative= positive
4-6
f(-2)=-2

f(x) means that you subsitute x for x in the equation exg
f(1)=x+2 means f(1)=1+2
f(4)=x+2 means f(4)=4+2

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