How do you use synthetic substitution to find x=-3 for $f (x) = 2 x^{2} - 4 x + 7$ $f(x) = 2x^2-4x+7$ ?

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Answer 1 · 2015-10-23T12:08:27

$f (- 3) = - 37$ $f(-3) = -37$
(see below for evaluation using synthetic substitution)

${: (,"|",,2,,-4,,7,), (-3,"|",,,,-6,,+30,), (,,"--","-----","--","-----","--","-----","--"), (,,,2,,-10,"|",37,"|"), (,,,,,,,"-----",) :}$

How do you use synthetic substitution to find x=-3 for f(x) = 2x^2-4x+7f(x)=2x2−4x+7f(x) = 2x^2-4x+7?