Question

Determinar as coordenadas dos extremos da função y = -2x² + 7x + 4.

Answer 1

x = -b/2a
x = -7/2.(-2)
x = -7/-4
x = 7/4

y = -(b² - 4ac)/4a
y = -(7² - 4.(-2).4)/4.(-2)
y = -(49 + 32)/-8
y = -81/-8
y = 81/8