factorise-0-20

Published at 800 × 800 in How many quadratics factorise?
Quadratics of the form $x^2 + bx + c$ which factorise, for $b,c < 20$.

Quadratics of the form $x^2 + bx + c$ which factorise, for $b,c < 20$.

Quadratics of the form $x^2 + bx + c$ which factorise, for $b,c < 20$.

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