How do you simplify and list the restrictions for $h (x) = \frac{7 - x}{3 x - 21}$ $h (x)= (7 - x) /( 3x - 21)$ ?

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Answer 1 · 2015-09-19T20:51:58

Refer to explanation

We have that

$3 x - 21 = 0 \Rightarrow x = 7$ $3x-21=0=>x=7$ hence the domain is $R - {3}$ $R-{3}$

we have that

$h (x) = \frac{7 - x}{3 (x - 7)} = - \frac{1}{3}$ $h(x)=(7-x)/(3(x-7))=-1/3$

How do you simplify and list the restrictions for h (x)= (7 - x) /( 3x - 21)h(x)=7−x3x−21h (x)= (7 - x) /( 3x - 21)?