4(x^2+3y^2)-(9xy)-(5(2x^3-3y^2)+xy)
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Answer:
-10x³ + 4x² + 27y² - 10xy
Step-by-step explanation:
4(x² + 3y²) - (9xy) - (5(2x³ - 3y²) + xy )
= 4x² + 12y² - 9xy - (10x³ - 15y² + xy)
= 4x² + 12y² - 9xy - 10x³ + 15y² - xy
= -10x³ + 4x² + 27y² - 10xy
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