Core Pure

Question 1

Roots of a polynomial?

Answer 1

starting at -b/a as the sum of the roots, increase the numerator by one letter each time, and flip the sign. Also increase the number of factors in each part of the sum.

Question 2

Double Angle Formulae

Answer 2

sin(2x) = 2 * sin(x) * cos(x)
cos(2x) = cos^2(x) - sin^2(x)