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Expand to get xy+3y-4x-12=x^2+y^2Rearrange to xy+3y-4x-12-x^2-y^2
Then you have to differentiate implicitly:
use product rule on xy to get:u = x v =ydu = 1 dv = dy/dx
so xy differentiates t...

. Vaccine contains antigens from the pathogens . This is recognised by helper T cells which activates other helper T cells and B cells . B cells undergo clonal selection and produce memory + plasma cells ...

A typical subjunctive/indicative exercise- my answers are in bold.Il est important que je [venir] ce soir, car ma soeur m'attende. vienne (subj)Je pense...

The idea that Supreme Court justices are politicians in robes is most surely backed-up by the politicisation of the appointment process. Merrick Garland, a liberal judge, was rejected by a republican sena...

While the presence and significance of the wealth of problems posed by the Czar's government should not be downplayed, it is highly likely that without the First World War - and its military problems - th...