Question

URGENTE
O ponto de máximo da parábola y = -x²+x-1 é:
O (1/2; -3/4)
(0,0)
O O O O
(-1/2; - 3/4)
a parábola possui ponto de mínimo​

Answer 1

$\mathsf{x_{v}=-\dfrac{b}{2a}=-\dfrac{1}{2.(-1)}=\dfrac{1}{2}}$

$\mathsf{\Delta=1-4=-3}\\\mathsf{y_{v}=-\dfrac{\Delta}{4a}=-\dfrac{-3}{4.(-1)}=-\dfrac{3}{4}}$

$\boxed{\boxed{\boxed{\boxed{\mathsf{O(\dfrac{1}{2},-\dfrac{3}{4})}}}}}$