\frac{36}{25}x^2-\frac{4}{5}x+\frac{1}{9}

9x^2+42x+49

x^2-36

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

81x^2+72x+16

81x^2+180x+100

10x^2-2\sqrt{10}x+1

7x^2+2\sqrt{7}x+1

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

\frac{36}{25}x^2-\frac{1}{100}

\frac{4}{25}x^2+\frac{2}{25}x+\frac{1}{100}

x^2-9

25x^2-16

\frac{16}{25}x^2+\frac{56}{45}x+\frac{49}{81}

\frac{1}{4}x^2+\frac{3}{10}x+\frac{9}{100}

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

16x^2+16x+4

25x^2-25

16x^2+72x+81

\frac{16}{25}x^2+\frac{4}{25}x+\frac{1}{100}

\frac{81}{25}x^2-\frac{8}{5}x+\frac{16}{81}

5x^2-4\sqrt{5}x+4

9x^2+48x+64

\frac{36}{25}x^2-\frac{1}{4}

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