Respuesta :

texaschic101
f(x) = x^2 - 3x........f(-1.8)...basically, u sub in -1.8 for x

f(-1.8) = (-1.8)^2 - 3(-1.8)
f(-1.8) = 3.24 + 5.4
f(-1.8) = 8.64
JonHenderson55
Answer:  f(-1.8) =  8.6  .
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Basically, plug in "(-1.8)" for "x" ; and solve:

Given:  f(x) = x² − 3x ;
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            f(-1.8) = (-1.8)²  −  3(-1.8) ;

            f(-1.8) = [(-1.8)*(-1.8)]  − [3(-1.8)] ;

            f(-1.8) =  3.24  − (-5.4) ;
    
            f(-1.8) =  3.24  +  5.4 ;

            f(-1.8) =  8.6  .
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