Question

[trần hải bách]

rút gọn biểu thức:(8x^3-4x^2):4x-(4x^2-5x):(2x)+(2x)^2

(3x^3-x^2y):x^2-(xy^2+x^2y):(xy)+2x(x-1)

Answer 1

[Nguyễn Lê Phước Thịnh]

a: Ta có: \(\left(8x^3-4x^2\right):4x-\left(4x^2-5x\right):2x+\left(2x\right)^2\)

\(=2x^2-x-2x+\dfrac{5}{2}+4x^2\)

\(=6x^2-3x+\dfrac{5}{2}\)

b: Ta có: \(\left(3x^3-x^2y\right):x^2-\left(xy^2+x^2y\right):xy+2x\left(x-1\right)\)

\(=3x-y-y-x+2x^2-2x\)

\(=2x^2-2y\)