# Pre-Algebra Help Online

Pre-algebra is a form of mathematics used in preparing a student for the study of algebra. The subjects reviewed in pre-algebra are:
• Basic Equations
• GCF and LCM
• Fractions
• Factors and Primes
• Square Roots

### Review of Pre-Algebra

Our intensive tutoring of Pre-Algebra tutoring covers topics such as:

#### Pre Algebra Terms

There are a variety of terms utilised in pre-algebra, for example; coefficient, constant, factor, expression variable, exponent, quotient, power, absolute values, integers and others. The terms are explained as:

• Coefficient is a numerical part of a variable term.
• Expression is mathematical sentence with more than one operation
• Factor takes place when two numbers are multiplied.
• Variable represents one number or more.
• Quotient is an answer to a basic division problem.
• Power is made up of an exponent
• Exponent represents the number of times a base is used as a factor.

#### Pre Algebra Formulas

Listed below are pre algebra formulas:

#### Polynomial Factoring Formulas:

${(x + y)}^{2} = {x}^{2} +{y}^{2} +2xy$
${(x - y)}^{2} = {x}^{2} +{y}^{2} -2xy$
${x}^{2} - {y}^{2} =(x+y)(x-y)$
${x}^{3} +{y}^{3} =(x+y)({x}^{2} -xy+{y}^{2} )$
${x}^{3} -{y}^{3} =(x-y)({x}^{2} +xy+{y}^{2} )$

The value of x for the quadratic equation, ${ax}^{2} +bx+c=0, x\neq 0$  is  $x = -b \pm b 2 \sqrt{-4ac 2a}$

#### Law of Exponent

${x}^{a} *{x}^{b} = {x}^{a+b}$
${(x a )}^{b} = {x}^{ab}$
${(xy)}^{a} ={x}^{a} {y}^{b}$
${x}^{-a} = \frac{1}{{x}^{a}}$

#### Some Other Formulas:

• Area of Triangle = $\frac{1}{2}$Base * Height
• Area of a rectangle = Length * Breadth
• Area of a Square = Side * Side
• Area of a circle = $2\pi{r}^{2}, r$= radius of the circle
• Circumference of the Circle = $2\pi; r, r$= radius of the circle
• Perimeter of Square = 4Side
• Perimeter of a rectangle = 2(Length+ Breadth)
• Sum of the angles in a polygon = $(n - 2)180$, n = sides of the polygon

Math >> Pre-Algebra

## More Math Topics

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