Question

me ajudem pfv e pra amanha

Answer 1

x²-5x+6=0  a=1 / b=-5 / c=6
Δ=b²-4.a.c
Δ=(-5)²-4.1.6
Δ=25-24
Δ=1

x= -b+- √Δ/2a

x= 5+- √1/2.1
x= 5+- 1 /2

x¹= 5+1/2
x¹= 6/2
x¹= 3 

x²= 5-1/2 
x²=4/2
x²= 2 

b) x² -8x + 12=0  a=1 b=-8 c= 12 

Δ=b²-4.a.c 
Δ= (-8)² -4.1.12
Δ=64 - 48
Δ= 16

x= -b +- √Δ/ 2a
x= 8 +- √16 / 2.1
= 8 +- 4 / 2 

x¹= 8 +4/2 
x¹= 12/2
x¹= 6 

x²= 8-4/2
x²= 4/2 
x²=2 

x²+ 2x -8=0  a=1 b=2 c= -8 

Δ=b² -4a.c
Δ= 2² -4.a.(-8)
Δ= 4 + 32= 36 

x= -b +- √Δ/ 2.a
x= -2 +- √36/2 
x= -2 +- 6 /2 

x¹= -2 +6/2
x¹= 4/2 
x¹= 2 

x²= -2 -6/2 
x²= -8/2 
x²= =-4