Question

6-resolva as equações .
a) (x - 2) = 9
b) (x + 5)2 = 9
C) (x - 1)² = 12
d) (x + 6)2 = 75

Answer 1

Resposta:

a) x-2=9

x=9-2

x=7

b)(x+5)2=9

2x+10=9

2x=9-10

2x=-1

x=-1/2

c)(x-1)^2=12

x^2-2*x*1+1^2=12

x^2-2x+1=12

x^2-2x=12-1

x^2-2x=11

d)(x+6)2=75

2x+12=75

2x=75-12

2x=63

x=63/2

x=31,5

Explicação passo a passo: