Question

Urgent!! Dau 20 de puncte!! ​

Answer 1

Răspuns:

Explicație pas cu pas:

2x + 1 = -1; 1; -3; 3

2x = -2; 0; -4; 2

x = -1; 0; -2; 1

A = {0, 1}

___________

(8x + 21)/(2x+ 3) = (8x + 12 + 9)/(2x + 3) = (8x + 12)/(2x + 3) + 9/(2x + 3)

= 4(2x + 3)/(2x + 3) + 9/(2x + 3) = 4 + 9/(2x + 3)

2x + 3 = -1; 1; -3; 3; -9; 9

2x = -4; -2; -6; 0; -12; 6

x = -2; -1; -3; 0; -6; 3

B = {-6, -3, -2, -1, 0, 3}