# LESSON 4: EXPONENTIAL EQUATIONS

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## Introduction

An equation is called an exponential eqution when it has an unknown variable as an index(exponent).Remember that in solving such equations you must consider the fact that if bn =bm

Objective
 The end of this lesson the learner should be able to: Define exponential equation. solve different exponential equation problems.

## Lesson Content

Find the value of x in the following:

1. 23x-1=4x+3
2. 4x+2=x-1
3. 8x=0.25

Solution

1. 23x-=4x+3
• 23x-1=(22)x+4
• 23x-1=22(x+3)
• 3x-1=2(x+3)
• 3x-1=2x+6
• x=7
1. 4x+2=<8x-1
• (22)x+=(23)x-i

# Assignment

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# Reading

 Put further reading here

Issesay 16:05, 26 February 2007 (CET)