Question

2X²-8X=24 resolva usando a fórmula de bhaskara

Answer 1

2x²-8x=24
2x²-8x-24=0
Δ=b²-4.a.c
Δ=(-8)²-4.2.(-24)
Δ= 64+192
Δ=256

x=-b+/- √Δ/2.a
x'= -(-8) +√256/2.2
x'= 8+16/4
x'=24/4
x'=6

x"= -(-8) -16/4
x"=+8-16/4
x"=-8/4⇒x"=-2    S{6,-2}

Answer 2

∆=b^2-4ac ∆=(-8)^2 - 4.2.(-24) ∆=64+192 ∆=256 x= -b ± √∆ / 2a x1= -(-8) ±√256 / 2.2 x1= 8 ± 16 / 4 = 24/4 = 6 x2 = 8 ± 16 / 4 = -8/4 = -2 S={6, -2}