Question

Rezolva in mulțimea Z ecuatiile:
A) |x|=7
B)|x|-5=1
C)|x-3|=11
D) -3|x+2|=18
E) |x+2|×(-5)+6=1​

Answer 1

a) |x| = +/- 7

b) |x| - 5 = +/- 1 / - 5 => x = { - 4 ; - 6 }

c) |x - 3| = +/- 11 / + 3 => x = { 14 ; - 8 }

d) - 3 |x + 2| = +/- 18 + 3 => x + 2 = { 21 ; - 15 } / - 2 => x = { 19 , - 17 }

e) |x + 2| * ( - 5 ) + 6 = 1 / - 6

|x + 2| * ( - 5 ) = - 5 / : ( - 5 )

|x + 2| = +/- 1 / - 2 => x = { - 1 ; - 3 }

Answer 2

Răspuns:

Explicație pas cu pas: