Question

raizes da equacao 2x elevado a 2 -8x-10=0

Answer 1

2x²-8x-10=0
Δ= b²-4ac
Δ= 64+80
Δ=144

x= -b +- √Δ/2a
x= 8 + - 12/4

x'= 5
x''= -1

S:[ -1,5]

Answer 2

$2 x^{2} -8x-10=0 \\ \\ \Delta=(-8)^2-4.2.(-10)=64+80=144 \\ \\ x=\frac{8+-\sqrt{144}}{4}=\frac{8+-12}{4} \\ \\ x_1=\frac{8-12}{4}=-1 \\ \\ x_2=\frac{8+12}{4}=5$