9x^2-6ax+a^2+16x^2+8x+1=25x^2-25x+1
-6ax+a^2+8x+1=-25x+1
-6ax+a^2 = -32x
a(6x-a)= 32x^2
32x^2-6ax+a^2=0
D=36a^2-4*32*a^2=36a^2-128a^2= -92a^2 <0
E a -(-oo 0) U (o +oo)
9x^2-6ax+a^2+16x^2+8x+1=25x^2-25x+1
-6ax+a^2+8x+1=-25x+1
-6ax+a^2 = -32x
a(6x-a)= 32x^2
32x^2-6ax+a^2=0
D=36a^2-4*32*a^2=36a^2-128a^2= -92a^2 <0
E a -(-oo 0) U (o +oo)