# Radicals Assignment Help

## Radicals Introduction

An equation that contains roots involving variables, such as (x-5) =2 is called a radical equation. The main goal in solving them is to get rid of roots and to convert the radical equation to some simple, known equation.

Product rule for radicals:

na . nb = nab

Quotient rule for radicals:

na / nb = na/b

Adding and Subtracting Radical Expressions:

We can add or subtract radicals using the distributive property.

Example: 53 +23

= (5+2)3

= 73

Multiplying Radical Expressions:

Using special product rule with radicals:

(a-b) .(a+b) = a^{2} +b^{2}

### Solving an equation with radicals:

- Isolate the radical (or at least one of the radicals if there are more than one).
- Square both sides
- Combine like terms
- Repeat steps 1-3 until no radicals are remaining
- Solve the equation
- Check all solutions with the original equation (some may not work)

Example

x= (3x+7) -1

Adding 1on both side x+1 = (3x+7)

Squaring both side x^{2}+2x+1=3x+7

Subtracting 3x+7 from both side:

x^{2} + x-6=0

(x-3)(x+2) =0

So x = -2 and x = 3, but only x =3 makes the original equation equal.

Dividing by a complex number:

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