A.9x²+6x+1= B.25x²-20x+4= E.x²-36= G.16-(x+5)²= I.(3x+5)²-(2x-3)²= K.(3x+8)(2x-7)+(x-3)(2x-7)= M.(5x-2)²+4(5x-2)= O.(x-3)(x+4)-(x-3)= Q.(3x+2)²+(3x+2)=

25x^2-20x+4=(5x+2)^2
16-(x+5)^2=(4-x-5)(4+5+x)=(-1-x)(x+9)
(3x+5)^2-(2x-3)^2=(3x+5-2x+3)(3x+5+2x-3)=(x+8)(5x+2)
(3x+8)(2x-7)+(x-3)(2x-7)=(2x-7)(3x+8+x-3)=(2x-7)(4x+5)
(5x-2)^2+4(5x-2)=(5x-2)(5x-2+4)=(5x-2)(5x+2)
(x-3)(x+4)-(x-3)=(x-3)(x+4-1)=(x-3)(x+3)
(3x+2)^2+(3x+2)=(3x+2)(3x+2+1)=(3x+2)(3x+3)

A=(3x)²+2*3x*1+1²=(3x+1)²
B=(5x)²-2*5x*2+2²=(5x-2)²
E=x²-6²=(x-6)(x+6)
G=4²-(x+5)²=(4-x-5)(4+x+5)=(-1-x)(9+x)