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#
If a = −4, and b = 3, what is |a − b|?

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Question:

A
7

explanation

The vertical bars surrounding a − b designate the absolute value of the difference. The absolute value of an expression is the distance from the simplified expression to 0; absolute value is always positive. Substitute the given values of a and b into the expression, evaluate the difference, and then apply the absolute value to make it positive.

|a − b|

= |−4 − 3|

= |−7| = 7

Recall that −4 − 3 is equivalent to −4 + −3 = −7

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