Question

Bài 1.Tính

a) \(\left(x+4\right)^3\)

b) \( \left(2x-5\right)^3\)

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

d) \(\left(-3x-2y\right)^3\)

e)\(\left(2x^2y-3xy^2\right)^3\)

f)\(\left(x+\dfrac{1}{3}y^2\right)^3\)

Answer 1

a: \(=x^3+4x^2+16x+64\)

b: \(=8x^3-60x^2+150x-125\)

c: \(=\dfrac{1}{8}-\dfrac{3}{4}x^2+\dfrac{3}{2}x-x^3\)

d: \(=-\left(27x^3+54x^2y+36xy^2+8y^3\right)\)

f: \(=x^3+x^2y^2+\dfrac{1}{3}xy^2+\dfrac{1}{27}y^6\)