Simplify: 3x(4x²-11x+7) -2x(9x²-4x+5)
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Answer:
- 6x³ - 25x² + 11x
Step-by-step explanation:
3x ( 4x² - 11x + 7 )
= 3x ( 4x² ) + 3x ( - 11x ) + 3x ( 7 )
= 12x³ - 33x² + 21x
- 2x ( 9x² - 4x + 5 )
= - 2x ( 9x² ) - 2x ( - 4x ) - 2x ( 5 )
= - 18x³ + 8x² - 10x
Substitute the values,
3x ( 4x² - 11x + 7 ) - 2x ( 9x² - 4x + 5 )
= 12x³ - 33x² + 21x - 18x³ + 8x² - 10x
= 12x³ - 18x³ - 33x² + 8x² + 21x - 10x
= - 6x³ - 25x² + 11x
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