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प्रश्न
Simplify : a2 − 2a + {5a2 − (3a - 4a2)}
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उत्तर
= a2 − 2a + {5a2 − 3a + 4a2}
= a2 − 2a + {9a2 − 3a}
= a2 − 2a + 9a2 − 3a
= 10a2 − 5a
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