7. If A = {x: x2 – 3x + 2 = 0}, B = {x: x2 + 4x - 12 = 0}, then B - A is equal to
(a) {-6}
(b) {1}
(c) {1,2}
(d) {2,-6}
2X242X282-1
The number of nroner sub sets of the cot 12
25
15 671 is
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