\frac{49}{100}x^2-\frac{49}{16}

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

9x^2-25

100x^2+20x+1

\frac{36}{25}x^2-\frac{8}{5}x+\frac{4}{9}

100x^2+120x+36

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

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

\frac{9}{25}x^2-\frac{16}{121}

\frac{1}{4}x^2-\frac{49}{121}

25x^2+20x+4

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

100x^2-160x+64

\frac{16}{25}x^2-\frac{32}{55}x+\frac{16}{121}

100x^2+80x+16

100x^2-200x+100

81x^2-81

5x^2-6\sqrt{5}x+9

7x^2+8\sqrt{7}x+16

10x^2-4\sqrt{10}x+4

9x^2-49

5x^2-2\sqrt{5}x+1

\frac{9}{16}x^2+\frac{2}{3}x+\frac{16}{81}

\frac{81}{25}x^2+\frac{27}{5}x+\frac{9}{4}

81x^2-81