Question

me ajudem pfv

1-resolva as equações incompletas do segundo grau:​

Answer 1

Resposta:

a) x= 0, x= 1/5

b) x=0, x=7

c)x=-5,x=0

d) x=0,x = 5

e) x=0,x= 9/4

f) x=0,x= -5/3

g)x=0,x=3

h)x= 0,x=-1/5

i)x=0,x=-1

j)x= 0,x=1/7

k)x=0,x= 7/2

l)x=0,x= 4

m)x= 0,x= -2

n) x=0,x= 5

Explicação passo-a-passo:

a) x.(5x-1)=0

x=0

5x-1=0

5x=1

x=1/5

b)x(x-7)=0

x=0

x-7=0

x=7

c)x(x+5)=0

x=0

x+5=0

x=-5

d)x(5x-25)=0

x=0

5x-25=0

5x=25

x=25÷5=5

e)x(4x-9)=0

x=0

4x-9=0

4x=9

x=9/4

f)x(3x+5)=0

x=0

3x+5=0

3x=-5

x=-5/3

g)x(4x-12)=0

x=0

4x-12=0

4x=12

x=12÷4=3

h)x(5x+1)=0

x=0

5x+1=0

5x=-1

x=-1/5

i)x(x+1)=0

x=0

x+1=0

x=-1

j)x(7x-1)=0

x=0

7x-1=0

7x=1

x=1/7

k)2x²-7x=0

x(2x-7)=0

x=0

2x- 7=0

2x=7

x=7/2

l)2x²-8x=0

x(2x-8)=0

x=0

2x-8=0

2x=8

x=8÷2= 4

m)7x²+14=0

x(7x+14)=0

x=0

7x+14=0

7x=-14

x=-14/7 =-2

n)x(-2x+10)

x=0

-2x+10=0

-2x=-10

x=-10/-2 = 5

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