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Chapter 1: Q56. (page 24)

Evaluate the expression when a=-2andb=-13.

localid="1649144803427" -a+b

Short Answer

Expert verified

The value of the expressionis 15.

Step by step solution

01

Step-1 – Absolute value of a number

Absolute value of any positive or negative number is always positive and equal to the magnitude of the number. The absolute value of a number N is denoted by N.

The absolute value of a number represents the distance of the number from 0 in the number line.

02

Step-2 – Example of Absolute value

The absolute value of 3 is denoted by 3and is equal to 3.

And the absolute value of -4is denoted by -4and is equal to 4.

03

Step-3 – Evaluate the expression

To evaluate the value of the expression -a+b, substitute -2 for a and -13 for b and simplify further as shown below,

鈭�a+b=鈭�鈭�2+鈭�13=2+13=2+13=15

Thus, the value of the given expression is 15.

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