Question

Calcule o Delta da equação f(x) = 2x² - 3x + 10
a) 71
b)-71
c) 80
d) -89
e) -80

Answer 1

$\boxed{\begin{array}{l}\sf\Delta=b^2-4ac\\\sf\Delta=(-3)^2-4\cdot2\cdot10\\\sf\Delta=9-80\\\sf\Delta=-71\\\huge\boxed{\boxed{\boxed{\boxed{\sf\red{\maltese}~\blue{alternativa~a}}}}} \end{array}}$