from the sum of 4+5x and - 5+3x-6x2, subtract the sum of 9x2+4x and 5x2-5x+7
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Sum of 4 + 5x and -5+3x - 6x²
=> 4 + 5x - 5 + 3x - 6x²
=> -1 + 8x - 6x²
♠ Sum of 9x² + 4x and 5x² - 5x + 7
=> 9x² + 4x + 5x² - 5x + 7
=> 14x² - x + 7.
♠ Subtracting the sum of 4+5x and -5+3x -6x2 from 14x² - x + 7.
=> 14x² - x + 7 - ( -1 + 8x - 6x²)
=> 14x² - x + 7 + 1 - 8x + 6x²
=> 20x² - 9x + 8 [ Answer ]
Sum of 4 + 5x and -5+3x - 6x²
=> 4 + 5x - 5 + 3x - 6x²
=> -1 + 8x - 6x²
♠ Sum of 9x² + 4x and 5x² - 5x + 7
=> 9x² + 4x + 5x² - 5x + 7
=> 14x² - x + 7.
♠ Subtracting the sum of 4+5x and -5+3x -6x2 from 14x² - x + 7.
=> 14x² - x + 7 - ( -1 + 8x - 6x²)
=> 14x² - x + 7 + 1 - 8x + 6x²
=> 20x² - 9x + 8 [ Answer ]
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