determinants ...question plz solve it ...urgent
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a2 + 2a = 1 squared + 2 x 1 = 1+2 = 3
2a + 1 = 2 x 1 + 1 = 3
2a + 1 = 2 x 1 + 1 = 3
a + 2 = 1 + 2 = 3
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