Question

7) O vértice da parábola f(x) = x2 - 4x + 3 é:
a) V (-1,-1)
b) V (2, 1)
-1)
d) V (20)
c) V (2​

Answer 1

$\mathsf{\Delta=16-12=4}\\\mathsf{x_{v}=-\dfrac{-4}{2.1}=2}\\\mathsf{y_{v}=-\dfrac{4}{4.1}=1}$

$\boxed{\boxed{\boxed{\boxed{\mathsf{V(2,1)}}}}}$