Question

Làm tính chia :

a) \(\left(5x^4-3x^3+x^2\right):3x^2\)

b) \(\left(5xy^2+9xy-x^2y^2\right):\left(-xy\right)\)

c) \(\left(x^3y^3-\dfrac{1}{2}x^2y^3-x^3y^2\right):\dfrac{1}{3}x^2y^2\)

Answer 1

Bài 45: (SBT/12):

a. (5x⁴ - 3x³ + x²) : 3x²

= (5x⁴ : 3x²) + (-3x³ : 3x²) + (x² : 3x²)

=\(\dfrac{5}{2}\)x² - x + \(\dfrac{1}{3}\)

b. (5xy² + 9xy - x²y²) : (-xy)

= [5xy² : (-xy)] + [9xy : (-xy)] + [(-x²y²) : (-xy)]

= -5y - 9 + xy

c. (x³y³ : \(\dfrac{1}{3}\)x²y³ - x³y²) : \(\dfrac{1}{3}\)x²y²

= (x³y³ : \(\dfrac{1}{3}\)x²y²) + (-\(\dfrac{1}{2}\)x²y³ : \(\dfrac{1}{3}\)x²y²) + (-x³y² : \(\dfrac{1}{3}\)x²y²)

= 3xy - \(\dfrac{3}{2}\)y - 3x