Question

Qual a coordenada x do vértice da parábola que
representa a função f(x) = x? - 3x -10 ?*
O 1,3
O 1,5
O -1,4
O -1,2​

Answer 1

$\mathsf{x_{V}=-\dfrac{b}{2a}}\\\mathsf{x_V=-\dfrac{-3}{2\cdot1}=1,5}\\\huge\boxed{\boxed{\boxed{\boxed{\mathsf{\spadesuit~~alternativa~~b}}}}}$