Can somebody please explain to me why the answer to is ±2.5 and not just 2.5 and why the answer to is 2.66 and not ±2.66 ?

Hopefully you understand where my confusion is... it's about ± and when it should and shouldn't be used.

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- Apr 23rd 2008, 06:28 AMmt_lapinFind all real-number solutions...
Can somebody please explain to me why the answer to is ±2.5 and not just 2.5 and why the answer to is 2.66 and not ±2.66 ?

Hopefully you understand where my confusion is... it's about ± and when it should and shouldn't be used. - Apr 23rd 2008, 06:35 AMmr fantastic