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

16x^2-36

16x^2-8x+1

10x^2+4x+8

\frac{81}{25}x^2-\frac{24}{5}x+\frac{16}{9}

10x^2+12\sqrt{10}x+36

-3x^2-27x+30

25x^2+40x+16

9x^2+3x+7

81x^2-25

21x^2-10x+1

16x^2+8x+1

\frac{16}{9}x^2-\frac{81}{25}

\frac{36}{25}x^2-\frac{81}{4}

24x^2-10x+1

7x^2+4\sqrt{7}x+4

25x^2-90x+81

7x^2+6\sqrt{7}x+9

\frac{1}{16}x^2-\frac{1}{10}x+\frac{1}{25}

6x^2-42x+60

x^2-12x+36

25x^2+20x+4

\frac{81}{25}x^2-\frac{36}{121}

16x^2-9

3x^2+15x-42