Question

Mọi người ơi giúp mik với ạ, mik đg cần gấp.cho mik câu trả lời chi tiết với ạ, xong mik sẽ tick mik cảm ơn ạ!

Answer 1

1.\(\left(x+2y\right)^2\)

\(=x^2+2.x.2y+\left(2y\right)^2\)

\(=x^2+4xy+4y^2\)

2.\(\left(a+3b\right)^2\)

\(=a^2+2.a.3b+\left(3b\right)^2\)

\(a^2+6ab+9b^2\)

3.\(\left(x+\dfrac{1}{4}\right)^2\)

\(=x^2+2.x.\dfrac{1}{4}+\left(\dfrac{1}{4}\right)^2\)

\(=x^2+\dfrac{1}{2}x+\dfrac{1}{16}\)

4.\(\left(\dfrac{3}{2}x+3y\right)^2\)

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

\(=\dfrac{9}{4}x^2+9xy+9y^2\)

5.\(\left(x+y\right)^2\)

\(=x^2+2xy+y^2\)

Answer 2

`a, x^2 + 4y + 4y^2`

`b, a^2 + 6ab + 9b^2`

`c, x^2 + 1/2x + 1/16`

`d, 9/4x^2 + 9xy + 9y^2`

`e, x^2 + 2xy + y^2`