How to Solve Cubic Equations Using the Factor Theorem
Solve cubic equations by finding a root with the rational root theorem, dividing it out, and solving the remaining quadratic. Worked examples.
Tagged: equations
4 guides.
Newton's Method Explained: Finding Roots with Tangent Lines
How Newton's method finds roots of equations by following tangent lines, the formula, worked examples for √2 and cos x = x, and when it fails.
How to Solve Simultaneous Equations: Substitution vs Elimination
Solve pairs of simultaneous equations by substitution or elimination, see what the answer means on a graph, and spot when there is no solution.
Three Ways to Solve a Quadratic Equation
Solve quadratic equations by factoring, the quadratic formula and completing the square, with worked examples and tips on choosing a method.