Làm phép tính:
a) (-xy)10 : (-xy)5 ; (5x2y4) : (10x2y)
b) (15x4y3z2) : (5x2y2z2) ; \(\frac{3}{4}x^3y^3:\left(-\frac{1}{2}x^2y^2\right)\)
c) 6x3y5 : 12x3y2 ; (25x5 -5x4 +10x2) : (5x2)
d) \(\frac{2}{3}xy\left(2x^2y-3xy+y^2\right)\) và \(-\frac{3}{4}x^3y^5z:\left(5x^2y^2z\right)\)
a) (-xy)10 : (-xy)5 = (-xy)2
b) (5x2y4) : 10x2y = y3/2
c) (15x4y3z2) : (5x2y2z2) = 3x2y
d) \(\frac{3}{4}x^3y^3:\left(-\frac{1}{2}x^2y^2\right)=\frac{\frac{3}{4}x^3y^2}{-\frac{1}{2}x^2y^2}=-\frac{3}{2}x\)
e) 6x3y5 : 12x3y2 = y3/2
f) (25x5 - 5x4 + 10x2) : (5x2)
= 5x3 - x2 + 2
g) \(\frac{2}{3}xy\cdot\left(2x^2y-3xy+y^2\right)=\frac{4}{3}x^3y^2-2x^2y^2+\frac{2}{3}xy^3\)
h) \(\frac{3}{4}x^3y^5z:\left(5x^2y^2z\right)=\frac{\frac{3}{4}x^3y^5z}{5x^2y^2z}=\frac{3}{20}xy^3\)
Cảm ơn a CTV ạ!