Learn how to solve equations with brackets, 𝑥 terms on both sides, and fractions using inverse operations in this GCSE maths study guide.

This paper provides concrete evidence that the expanding and accelerating Universe mathematically expressed by dark energy is ...

T. H. Gronwall, Note on the Derivatives with Respect to a Parameter of the Solutions of a System of Differential Equations, Annals of Mathematics, Vol. 20, No. 4 (Jul., 1919), pp. 292-296 ...