The problem
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how did they get this answer? I need to find
Answer provided by our tutors
You are using functional notation: f(16)f(x)
Syntactically "f(x)" is equivalent to "the variable f multiplied by the variable x, in parentheses", so a single value (such as 'y') should be used.
y=-2*sqrt(x)+5
Now, the entry "f(16)f(x)" appears to indicate a need to solve for f(16), given the function f(x)=-2*sqrt(x)+5
So simply replace any instance of 'x' with (16) and simplify the expression. This is best handled through the desktop Algebrator:
Windows: http://www.softmath.com/tr/alg51win-tr-en.exe
Mac: http://www.softmath.com/tr/alg51mac-tr-en.dmg
The solver simplifies the expression by manually replace every instance of 'x':
