Bài 1:
a: \(\left(x+3\right)^2=x^2+6x+9\)
b: \(\left(6-2x\right)^2=36-24x+4x^2\)
c: \(\left(x-4\right)\left(x+4\right)=x^2-16\)
d: \(\left(\dfrac{1}{2}x-4\right)^2=\dfrac{1}{4}x^2-4x+16\)
e: \(\left(x-\dfrac{3}{4}\right)^2=x^2-\dfrac{3}{2}x+\dfrac{9}{16}\)
f: \(\left(3x+1\right)^2=9x^2+6x+1\)
g: \(\left(3x+\dfrac{1}{3}\right)\left(\dfrac{1}{3}-3x\right)=\dfrac{1}{9}-9x^2\)
h: \(\left(x^2-2\right)^2=x^4-4x^2+4\)
Bài 2:
a: \(\left(x+5\right)^2=x^2+10x+25\)
b: \(\left(\dfrac{5}{2}-x\right)^2=\dfrac{25}{4}-5x+x^2\)
c: \(\left(2x+3y\right)^2=4x^2+12xy+9y^2\)
d: \(\left(-\dfrac{1}{8}x+\dfrac{2}{3}y\right)^2=\dfrac{1}{64}x^2-\dfrac{1}{6}xy+\dfrac{4}{9}y^2\)
e: \(\left(\dfrac{x}{4}-\dfrac{y}{6}\right)\left(\dfrac{x}{4}+\dfrac{y}{6}\right)=\dfrac{x^2}{16}-\dfrac{y^2}{36}\)
f: \(\left(2x-y\right)^2=4x^2-4xy+y^2\)
