Răspuns:
Explicație pas cu pas:
3.
2x + 1 = -1; 1; -7; 7
2x = -2; 0; -8; 6
x = -1; 0; -4; 3
A = {-4, -1, 0, 3}
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2x - 3 = -1; 1; -3; 3; -9; 9
2x = 2; 4; 0; 6; -6; 12
x = 1; 2; 0; 3; -3; 6
B = {-3; 0; 1; 2; 3; 6}
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A U B = {-4,-3, -1, 0, 1, 2, 3, 6}
A ∩ B = {0; 3}
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4.
I2x - 3I = 11
2x - 3 = 11
2x = 11 + 3 = 14
x = 14 : 2 = 7
2x - 3 = -11
2x = -11 + 3 = -8
x = -8 : 2 = -4
x = {-4; 7}
