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.
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.