$=9m^2+3mn+n^2$  

 $=6m^2–6mn+n^2$  

 $=9m^2–6mn+n^4$  

 $=64a^4b^2+112a^3b^7y^2+49a^2b^{12}y^4$  

 $=64a^4b^2+112a^2b^6y^2+49a^2b^{12}y^4$  

 $=64a^4b^2+112a^3b^7y^2+49a^2b^6y^2$  

 $=\frac{1}{4}a^4+\frac{4}{3}a^2b+\frac{4}{9}b^2$  

 $=\frac{1}{4}a^4-\frac{4}{3}a^2b+\frac{4}{9}b^2$  

 $=\frac{1}{4}a^4-\frac{2}{3}a^2b+\frac{4}{9}b^2$  

 $9x^4+\frac{3}{2}x^2+\ \frac{1}{16}$  

 $6x^4+\frac{3}{2}x^2+\ \frac{1}{16}$  

 $9x^4+\frac{3}{4}x^2+\frac{1}{16}$  

$\left(a\cdot b\right)^2$

$\left(5x-2y\right)^2$

$\left(z+h+r\right)^2$

$\left(3a+5u\right)^2$

( x + 7 ) ( x + 2 )

( x - 7 ) ( x + 2 )

( x + 7 ) ( x - 2 )

( x - 7 ) ( x - 2 )

(t + 4u) (t + 4u)

(t + 4u) (t - 4u)

(t + 4u)³

(t - 4u)²

 $n^2\ +\ 3$  

 $2n^2+3$  

 $3n^2+2$  

 $4n^2+4$  

$4n^2+1$

$5n^2+\ 3$

$2n^2-1$

$3n^2-2$