Question

Galera me ajudem nisso =)

f(x)=-2x²-16x+5

f(x)=-2x²+10x-13

Answer 1

-2x²-16x+5
a = -2
b = -16
c = 5

x = (-b ± √∆)/2a
∆ = b² - 4 * a * c
∆ = -16² - 4 * -2 * 5
∆ = 296
x = (-(-16) ± √296)/2-2
x = 16 ± 17.204650534085253/-4
x1 = 16 - 17.204650534085253/-4 = 0.30116263352131334
x2 = 16 + 17.204650534085253/-4 = -8.301162633521313


-2x²+10x-13
a = -2
b = 10
c = -13

x = (-b ± √∆)/2a
∆ = b² - 4 * a * c
∆ = 10² - 4 * -2 * -13
∆ = -4
nao tem solucao em IR