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प्रश्न
What must be added to x4 – x3 + x2 + x + 3 to obtain x4 + x2 – 1 ?
योग
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उत्तर
x4 + x2 – 1
+x4 – x3 + x2 + x + 3
– + – – –
x3 – x – 4
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Combining like Terms
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