\frac{49}{9}x^2-\frac{16}{25}

3x^2+18\sqrt{3}x+81

100x^2+160x+64

18x^2-9x+1

5x^2+10\sqrt{5}x+25

2x^2-2x-4

10x^2-18\sqrt{10}x+81

\frac{9}{4}x^2-\frac{12}{5}x+\frac{16}{25}

\frac{49}{81}x^2-\frac{49}{45}x+\frac{49}{100}

16x^2+56x+49

9x^2-12x+4

\frac{36}{25}x^2-\frac{9}{121}

x^2-20x+100

25x^2+30x+9

9x^2-48x+64

\frac{81}{4}x^2-\frac{18}{5}x+\frac{4}{25}

9x^2-4

\frac{81}{100}x^2-\frac{9}{4}

16x^2-1

-2x^2+22x

81x^2-100

6x^2+4x+11

5x^2+4x+12

18x^2-9x+1

-2x^2-10x+12