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

21x^2-10x+1

-3x^2-21x-30

4x^2-28x

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

10x^2+6\sqrt{10}x+9

3x^2+12\sqrt{3}x+36

4x^2+36x+81

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

x^2-18x+81

4x^2-1

7x^2+4x+6

16x^2-49

7x^2+12\sqrt{7}x+36

9x^2+24x+16

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

-6x^2+18x+108

100x^2-120x+36

32x^2-12x+1

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

4x^2-100

9x^2+2x+9

\frac{49}{16}x^2-\frac{7}{9}x+\frac{4}{81}

16x^2-56x+49

81x^2+36x+4