find f (-4) for each function

label Algebra
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 f(x)=x to the 2nd power 

 f(x)=7(x+2)to the 2nd power 

 f(x)=-x to the 3rd power

Jun 2nd, 2015

Please let me know if you need any clarification. I'm always happy to answer your questions.

A. f(x)=x to the second power implies that the derived value of x must be raised to power 2 or squared

Hence for the first function, we substitute x with -4 and power the result by 2

The answer is -4squared hence g(x) =16

B.For the second function, we substitute x in the expression and square the result too= 7(-4 squared)+2)

Use bodmas.....g(x).=7(16+2)=126

C. for f(x)=-x we establish that g(x)=-(-4 power three/cubed)

g(x)=-(-64)

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 2nd, 2015

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Jun 2nd, 2015
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