News and graphics at @ClimateLab, a project of @PostGraphics.
quad = (a, b, c) => {
const discriminant = pow(b, 2) - 4 * a * c;
return discriminant < 0 ? null : [-1, 1].map(s => (-b + sqrt(discriminant) * s) / (2 * a));
}
q = quad(4.9, 8, -300)
pow = Math.pow
sqrt = Math.sqrt
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