(5 + 9x) + (6-7 +4x²)
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Answer:
=5 + 9x + 6 - 7 + 4x²
=(5 + 6 - 7) + 9x + 4x²
=(11 -7) + 9x + 4x²
=4 + 9x + 4x²
=4x² + 9x + 4
Step-by-step explanation:
Hope it helps.
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