Question

Resolva usando delta e bhaskara​

Answer 1

|.x²-9=0

x²=0+9

x²=9

x=√9

x=3 ou x= -3

||.x²-7x+12=0

a=1 b=-7 c=12

∆= b²-4.a.c

∆=-7²-4.1.12

∆=49-48

∆=1

2° parte:

X=-b±√∆

2.a

X=-(-7)±√1

2.1

X¹=-(-7)+1=8= 4

2 2

X²=-(-7)-1=6= 3

2 2

|||.x²-3x=0

x(x-3)=0

x=0 ou x-3=0

x=3

|V.-x²+6x-9=0

a=-1 b=6 c=-9

∆=b²-4.a.c

∆=6²-4.(-1).(-9)

∆=36-36

∆=0

Part.2:

x=-b±√∆

2.a

x=-6±√0

2.(-1)

x¹=-6+0= -6= 3

-2 -2

x²=-6-0= -6=3

-2 -2