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Chapter 10: Q 2. (page 643)

2. To complete the square of x2-4x,add _______.

Short Answer

Expert verified

To complete the square of x2-4x, add 4.

Step by step solution

01

given information.

We have given quadratic expression is,x2-4x.

02

Step 2. Concept used.

To complete the square of x2+bxadd b22.

03

Step 3. Explanation.

We have given,

x2-4x

To complete the square we will add third term.

Third term = localid="1646648336070" b22

Comparing given expression with,

ax2+bxwe will get b is -4.

So third term = -422=4

It means to complete the square we need to add 4.

04

Step 4. Conclusion.

Hence, To complete the square of x2-4x, add 4.

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