Question 620711
Hi, there--
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I. Find f(-4) 
This notation means find the value of the function f what is associated with x=-4. We simply substitute -4 for x in the rule for f(x).
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f(x)={{{x^2+3x-3}}}
f(-4)={{{(-4)^2+3(-4)-3}}}
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Simplify the right hand side.
f(-4)={{{16-12-3}}}
f(-4)=1
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f(x)={{{x^2+3x-3}}}
f(-1)={{{(-1)^2+3(-1)-3}}}
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Simplify the right hand side.
f(-1)={{{1-3-3}}}
f(-1)=-5
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f(x)={{{x^2+3x-3}}}
f(-2x)={{{(-2x)^2+3(-2x)-3}}}
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Simplify the right hand side.
f(-2x)={{{4x^2-6x-3}}}
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Hope this helps! Feel free to email if you still have questions.
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Ms.Figgy
math.in.the.vortex@gmail.com