Question

determine as raízes de cada uma das equações h² - 77h - 324 = 0

Answer 1

$h^2-77h-324=0 \\ \\ \Delta=(-77)^2-4(1)(-324) \\ \Delta=5929+1296 \\ \Delta=7225 \\ \\ x= \frac{-(-77)\pm \sqrt{7225} }{2} = \frac{77\pm85}{2} \\ \\ x'= \frac{77+85}{2} = \frac{162}{2} =81 \\ \\ x"= \frac{77-85}{2} =- \frac{8}{2} =-4 \\ \\ V=\{-4,81\}$.