Question

[Ko no name]

Ai làm giúp mình bài 1;2 với

Answer 1

[nguyễn trần hà phương]

lm hết  aèk bẹn

Answer 2

[Nguyễn Lê Phước Thịnh]

Bài 1: 

1: \(\left(2a+b\right)^2=4a^2+4ab+b^2\)

2: \(\left(a-3b\right)^2=a^2-6ab+9b^2\)

4: \(\left(3x-5y\right)^2=9x^2-30xy+25y^2\)

7: \(\left(3x-1\right)^2=9x^2-6x+1\)

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

10: \(\left(3x-\dfrac{1}{2}\right)^2=9x^2-3x+\dfrac{1}{4}\)

11: \(\left(4-\dfrac{1}{2}x\right)^2=16-4x+\dfrac{1}{4}x^2\)

12: \(\left(3x-0.5\right)^2=9x^2-3x+\dfrac{1}{4}\)

13: \(\left(4x-0.25\right)^2=16x^2-2x+\dfrac{1}{16}\)