Question

Làm tính nhân :

a) \(5x^2\left(3x^2-7x+2\right)\)

b) \(\dfrac{2}{3}xy\left(2x^2y-3xy+y^2\right)\)

Answer 1

a) 5x².(3x² – 7x + 2) = 15x⁴ – 35x³ + 10x²

b) \(\dfrac{2}{3}\)xy( 2x²y – 3xy + y²) = \(\dfrac{4}{3}\)x³y² – 2x²y² + \(\dfrac{2}{3}\) xy³