QUESTION IMAGE
Question
given the following quadratic function, determine f(3)
f(x) = 2x² + x - 2
f(3) =
Step1: Sustituir \( x = 3 \) en la función
Sustituimos \( x = 3 \) en \( f(x) = 2x^2 + x - 2 \), entonces tenemos \( f(3) = 2(3)^2 + 3 - 2 \).
Step2: Calcular cada término
Primero, calculamos \( (3)^2 = 9 \), luego \( 2\times9 = 18 \). Después, sumamos y restamos: \( 18 + 3 - 2 \).
Step3: Realizar la operación final
\( 18 + 3 = 21 \), y \( 21 - 2 = 19 \).
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\( 19 \)