Question

Ps: Equações do 2° grau.resolva: b) 2x elevado a 2 = 20x + 48 =0

Answer 1

2x² +20x +48 = 0  : 2 

x² + 10x + 24 = 0

a=1  b= 10  c= 24

Δ = b² -4 .a .c 
Δ = 10² -4 .1 .24
Δ = 100 - 96
Δ = 4 

x = -b + - √Δ /2a
x = -10 + - √4 /2.1
x = -10+ - 2 /2

x' = -10 +2 / 2
x' = -8 /2
x'=-4

x" = -10 -2 /2
x" = -12/2
x" = -6