Question

dada a funçao f(x)=3x^2-2x+1. calcule os valores de f(-1),f(1/2) e f(3)

Answer 1

$f( - 1) = 3 {( - 1)}^{2} - 2 \times ( - 1) + 1 = \\ = 3 \times 1 + 2 + 1 = 3 + 2 + 1 = 6 \\ \\ f( \frac{1}{2} ) = 3 \times {( \frac{1}{2} )}^{2} - 2 \times \frac{1}{2} + 1 = \\ = 3 \times \frac{1}{4} - 1 + 1 = \frac{3}{4} \\ \\ f(3) = 3 \times {3}^{2} - 2 \times 3 + 1 = \\ = 3 \times 9 - 6 + 1 = \\ = 27 - 6 + 1 = 22$