Solving quadratic equations by taking the square root of both sides of the equation is explained. Some examples are provided to show the method step by step.

# Category Archives: Precalculus

## Solving Quadratic Equations I: Factoring (Grouping)

Solving quadratic equations by factoring is explained with some examples. Two methods are introduced to factorize quadratic equations. Other methods of solving quadratic equations are also addressed.

## Solving Equations II: Radical Equations

This article explains the process of solving equations with radicals. Solving radical equations is performed by isolating radicals and raising both sides to a power equal to the index of the radicals one by one. The method is explained and ten examples are solved to illustrate solving equations with radicals.

## Solving Equations I: Linear Equations

This article explains the process of solving equations of linear form. Solving linear equations is performed by isolating the unknown variable. Two methods are introduced to fulfill isolation. The article also contains ten examples to illustrate solving equations.

## Problem 2-6: Odd and Even Functions

Determining odd and even functions for sin(x), cos(x), sin(x)cos(x), x*sin(x), x^2 and sin(x)+cos(x)

## Problem 2-3: Solving an Inequality

Solving |2-3x|<3. The graph is also plotted to confirm the solution.

## Problem 2-1: Linearity of Functions

Linearity of y=x+1, y=2x+1, y=1, y=x^2+x+1, y=x^1+1, y=1/x, y=sin(x), y=sqrt(x), y=x+1/(1-x), 5x+2y-1=0 and y=x+c^2