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Chapter 9: Q 707 (page 1151)

In the following exercises, solve the equation:

u-4+4=u

Short Answer

Expert verified

The required value of the given equation isu1=4,u2=5

Step by step solution

01

Step 1. Given information

Given expression isu-4+4=u

02

Step 2. Solve the equation value for u

u-4+4=u鈬�u-4=u-4鈬�u-4=(u-4)2

Substitute back v=u-4

v=v2

Solve the equation:

v=0v=1

Substitute the value:

u-4=0鈬�u=4u-4=1鈬�u=5

03

Step 3. Check

4-4+4=45-4+4=5

L.H.S is equal to R.H.S

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