9x^2-12x+4

x^2-16x+64

\frac{4}{81}x^2-\frac{1}{25}

21x^2-10x+1

\frac{9}{25}x^2+\frac{21}{10}x+\frac{49}{16}

-5x^2-5x+10

9x^2+3x+11

4x^2-12x+9

100x^2+80x+16

-5x^2+15x+50

25x^2+20x+4

-4x^2+36x-32

11x^2+4\sqrt{11}x+4

4x^2-36

\frac{81}{25}x^2-\frac{81}{121}

16x^2-1

10x^2+6\sqrt{10}x+9

8x^2-6x+1

\frac{1}{4}x^2-\frac{1}{4}

\frac{49}{9}x^2-\frac{14}{33}x+\frac{1}{121}

7x^2-14\sqrt{7}x+49

\frac{4}{9}x^2-\frac{2}{5}x+\frac{9}{100}

16x^2-8x+1

4x^2-81

7x^2+2x+5