1.
\(a,=9x^2+6x+1\)
b, \(x^2-\frac{3}{2}x+\frac{9}{16}\)
e, \(=x^2-16\)
d, \(=x^4-4x^2+4\)
5.
a, ⇒ \(A=x^2-2xy+y^2+4xy\)
⇒ \(A=x^2+2xy+y^2=\left(x+y\right)^2\)
b, \(=36x^2-24x+4+4\left(6x-2+3xy-y\right)+y^2+4y+4\)
\(=36x^2-24x+24x-8+12xy-4y+y^2+4y+8\)
\(=36x^2+12xy+y^2=\left(6x+y\right)^2\)