4x^2-49

7x^2-20\sqrt{7}x+100

\frac{49}{81}x^2+\frac{14}{33}x+\frac{9}{121}

81x^2-36

9x^2+24x+16

\frac{1}{81}x^2-\frac{36}{25}

81x^2-162x+81

11x^2+8\sqrt{11}x+16

4x^2+4x+1

\frac{49}{25}x^2-\frac{81}{100}

x^2-4x+4

\frac{9}{4}x^2+\frac{21}{2}x+\frac{49}{4}

\frac{16}{9}x^2+\frac{16}{5}x+\frac{36}{25}

100x^2-64

\frac{9}{100}x^2+\frac{12}{55}x+\frac{16}{121}

\frac{16}{25}x^2+\frac{32}{45}x+\frac{16}{81}

\frac{1}{25}x^2-\frac{1}{121}

81x^2+54x+9

3x^2-6\sqrt{3}x+9

100x^2-25

7x^2+16\sqrt{7}x+64

3x^2+20\sqrt{3}x+100

\frac{16}{25}x^2-\frac{2}{5}x+\frac{1}{16}

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

25x^2+70x+49