What should be added to 7x³-5x²+2x+3 to get 9x⁴-6x²+2x+7 ?
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Answer:
Step-by-step explanation:
( 2x³ + 5x² - 2x + 7 ) + ( x³ + 4x² - x + 6 )
= 2x³ + 5x² - 2x + 7 + x³ + 4x² - x + 6
= 2x³ + x³ + 5x² + 4x² - 2x - x + 7 + 6
= 3x³ + 9x² - 3x + 13
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