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Chapter 1: Q. 298 - Exercises (page 76)

In the following question, evaluate the expression.

x+-21when (a)x=-27, (b)x=44.

Short Answer

Expert verified

(a) -48when x=-27.

(b)23whenx=44.

Step by step solution

01

Step 1. Given information .

Consider the given expression x+-21.

(a) x=-27, (b) x=44

02

Step 2. Find the value when x=-27.

Substitute the value of x in the given expression .

鈬�x+-21鈬�-27+-21鈬�-27-21鈬�-48

Therefore the value is -48whenx=-27.

03

Step 3. Find the value when x=44.

Substitute the value of x in the given expression .

鈬�x+-21鈬�44+-21鈬�44-21鈬�23

Therefore the value is23whenx=44.

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