Làm tính chia:
a/(5x\(^2\)-4x\(^2\)+7x):2x
b/(x\(^5\)+12x\(^3\)-9x\(^2\)):(-4x)
c/(x\(^2\)y+\(\dfrac{1}{3}\)x\(^2\)y\(^2\)+\(\dfrac{7}{2}\)x\(^3\)y):5xy
d/(3x\(^5\)y\(^2\)+\(\dfrac{1}{3}\)x\(^2\)y\(^2\)+4x\(^2\)y\(^3\)-9x\(^3\)y\(^3\)):(-\(\dfrac{1}{3}\)x\(^2\)y\(^2\))
e/(21x\(^5\)y\(^4\)-12x\(^4\)y\(^5\)+28x\(^3\)y\(^4\)-7x\(^4\)y\(^3\)):(-7x\(^3\)y\(^3\))
f/(14x\(^3\)-21a\(^3\)+3a\(^2\)):\(\dfrac{1}{2}\)a\(^2\)
g/(7a\(^3\)x\(^2\)-4a\(^2\)x-8a\(^2\)x\(^3\)):(-3a\(^2\)x)
h/[(a-b)\(^5\)-2(a-b)\(^4\)+3(a-b)\(^3\)]:[-5(b-a)\(^3\)]
i/(1-27x\(^3\)):(3x-1)
k/(8x\(^3\)+27y\(^3\)):(4x\(^2\)-6xy+9y\(^2\))
a: \(=\dfrac{5}{2}x-2x+\dfrac{7}{2}=\dfrac{1}{2}x+\dfrac{7}{2}\)
b: \(=\dfrac{-1}{4}x^4-3x^2+\dfrac{9}{4}x\)
c: \(=\dfrac{1}{5}x+\dfrac{1}{15}xy+\dfrac{7}{10}x^2\)
d: \(=-9x^3-1-12y+27xy\)
