Question

Giúp mk vs ạ

Answer 1

a: \(\left(2x+3y\right)^2=4x^2+12xy+9y^2\)

b: \(\left(5x-y\right)^2=25x^2-10xy+y^2\)

Answer 2

\(a,=4x^2+12xy+9y^2\\ b,=25x^2-10xy+y^2\\ c,=x^2+\dfrac{1}{2}x+\dfrac{1}{16}\\ d,=x^4-\dfrac{4}{25}y^2\\ e,=8x^3+12x^2y^2+6xy^4+y^6\\ f,=27x^6-54x^4y+36x^2y-8y^3\\ g,=x^3+64\\ h,=x^6-\dfrac{1}{27}\)