2
to work it out just go output f (x) - input x so, 3 - 1 = 2 and double check this using your next equations 4 - 2 = 2
6.9
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You put all the numbers on one side of the equation and letters on another.
0.25r + 0.5r - r = 0.5 +0.125
-0.75r = 0.625 divide both sides by -0.75
r = -0.125
we know that
The Zero Product Property states that if 
, then either 
or 
(or both)
we have
rewrite the expression
so
therefore
<u>the answer is the option</u>
x = –3 or x = 2
