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solniwko [45]
3 years ago
14

For the function f(x)=3xsquared- 2x+5 find f(1) f(-2) and f(a)

Mathematics
1 answer:
Oksanka [162]3 years ago
4 0
f(x)=3x^2-2x+5\\\\
f(1):\ \ Substitude\ 1 \ as\ x\ into\ function:\\
f(1)=3*1^2-2*1+5=3-2+5=\textbf{6}\\\\
f(-2)\ \ Substitude\ x=-2\\
f(-2)=3*(-2)^2-2*(-2)+5=3*4+4+5=12+4+5=\textbf{21}\\\\
f(a)\ \ substitude\ x=a\\
f(a)=\underline{3a^2-2a+5}
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