Question

$if \: f(x) = 3x^{2} - 5x + 7 \: show \: that \: f( - 1) = 3f(1)$
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Answer 1

Answer:

Proven in explanation...

Step-by-step explanation:

Using arithmetic, we get: $f(-1)=3(-1)^2-5(-1)+7=3+5+7=15$.

Then, we also get: $3f(1)=3[3(1)^2-5(1)+7]=3[5]=15$.

Since $15=15$, hence, $f(-1)=3f(1)$.