4. Subtract 5x2 - 8x + 6 from the sum of 3x2 - 4x + 2 and 7 – 5x2 - 6x.
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Answer:
-3x² + 4x -2
Step-by-step explanation:
the sum of 3x²- 4x + 2 and 7 – 5x² - 6x.
= 3x²- 4x + 2 + (7 – 5x² - 6x)
= 3x²– 5x² - 4x - 6x + 2 + 7
= -2x² - 10x +9
and
7 – 5x2 - 6x - (-2x² - 10x +9)
= – 5x2 +2x² - 6x +10x +7-9
= -3x² + 4x -2
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