Question

Calcule equação do 2 grau (baskara)

4x elevado a 2 + 8x + 3=0

x elevado a 2 -2x - 3=0

Answer 1

4x² +8x +3= 0
∆=8² -4.4.3 =64 -48= 16 => √∆= 4
x = -b±√∆/2a
x = -8±4/8
x' = -8+4/8 = -4/8 = -1/2 ✓
x" = -8-4/8 = -12/8 = -3/2 ✓

x² -2x - 3 = 0
∆= (-2)² -4.1.(-3) =4 +12 = 16 => √∆= 4
x = -b±√∆/2a
x = 2±4/2
x' = 2+4/2 = 6/2 = 3 ✓
x" = 2-4/2 = -2/2 = -1✓