Question

(3/2x+y)^3 theo hang dang thuc 4

Answer 1

\(\left(\frac{3}{2}x+y\right)^3=\left(\frac{3}{2}x\right)^3+3.\left(\frac{3}{2}\right)^2.y+3.\frac{3}{2}.y^2+y^3\)

Answer 2

\(\left(\frac{3}{2}x+y\right)^3\)

\(=\frac{27}{8}x^3+\frac{27}{4}x^2y+3xy^2+y^3\)

Answer 3

sorrybn,mk nhầm xíu:\(3xy^2\)fải là\(\frac{9}{2}xy^2\)

Answer 4

\(\left(\frac{3}{2}x+y\right)^3=\left(\frac{3}{2}x\right)^3+3\left(\frac{3}{2}x\right)^2y+3.\frac{3}{2}x.y^2+y^3=\frac{27}{8}x^3+\frac{27}{4}x^2y+\frac{9}{2}xy^2+y^3\)

Answer 5

\(\left(\frac{3}{2}x+y\right)^3\)

Hằng đẳng thức lập phương của 1 tổng

\(=(\frac{3}{2}x)^2+3.\frac{3}{2}x.y+3.\frac{3}{2}x.y^2+y^3\)

\(=\left(\frac{3}{2}x+y\right)^3\)