Question

1) resolva as equações

A)5n-7=2n+56

b)k2-6k+5=0

Answer 1

a)5n-2n=56+7

7n= 63

n=63/7

n=9

b)36-4.1.5

36-20

delta igual a 16 q eh igual a 4

6+4/2= 5

6-4/2= 1

Answer 2

Resposta:

Explicação passo-a-passo:

a)5n-7=2n+56

5n-2n=56+7

3n=49

n=49/3

n=16,3

b)Δ=b² -4ac

Δ=(-6)²- 4*1*5

Δ=36-20

Δ=16

x=-b±√Δ/2*a

x=-(-6)±√16-2*1

x=6±4/2

x1=6+4/2=10/2=5

x2=6-4/2=2/2=1