## Equations

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### Chemical equations - exercises

Quiz yourself on your knowledge of chemical reactions and chemical equations.

### Chemical equations and reactions

A chemical reaction is represented by a chemical equation that involves ions, atoms and molecular formulas. Main components of a chemical equation

### ES1 Linear equations

Equations with one variable may be solved using transposition skills to make the variable the subject of the equation.

### ES4 Quadratic formula

The solutions to any quadratic equation can be found by substituting the values a, b, c into the quadratic formula.

### ES5 Cubic equations, polynomial long division

One polynomial may be divided by another of lower degree by long division (similar to arithmetic long division).

### ES6 (ILS2.2) Exponential equations

Indicial (or exponential) equations have the form a to the power of x= b If we can write b as a number with a base a and an index, then we can equate the indices to find x. If two equal numbers are...