Distributive property question

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jr8181t
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Distributive property question

Postby jr8181t » Wed Aug 28, 2013 5:20 am

Can any one tell me why the answer to this problem: - (5x + 7) is

= -5x - 7

and not

= -5x + (-7)

Greatly appreciated if you can tell me. Thanks in advance.

jg.allinsymbols
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Re: Distributive property question

Postby jg.allinsymbols » Wed Aug 28, 2013 8:10 am

jr8181t wrote:Can any one tell me why the answer to this problem: - (5x + 7) is

= -5x - 7

and not

= -5x + (-7)

Greatly appreciated if you can tell me. Thanks in advance.


They both mean the same thing, and to the expression originally given.

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stapel_eliz
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Postby stapel_eliz » Wed Aug 28, 2013 7:35 pm

jr8181t wrote:Can any one tell me why the answer to this problem: - (5x + 7) is

= -5x - 7

and not

= -5x + (-7)

They're mathematically equivalent, but "simplified" form (the one without the parentheses) is considered more "proper". I would accept either form, but some instructors (and most computer assessments) won't accept the latter. Use with caution. :wink:


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