2,014
edits
Changes
Jump to navigation
Jump to search
Line 9:
Line 9: − +
→Two square roots for each number: rearranged slightly. removed +/- from the 9!
:<math>\sqrt{9} = 3</math>
:<math>\sqrt{9} = 3</math>
Since in many situations only the positive square root has any meaning, to be clear that both square roots are to be considered, in mathematics the convention is to use a sign, pronounced "plus or minus" to signify the distinct possibilites:
Since in many situations only the positive square root has any meaning, to be clear that both square roots are to be considered, in mathematics the convention is to use a sign, pronounced "plus or minus" to signify the distinct solutions:
:<math>\sqrt{9} = \pm 3</math>
:<math>\sqrt{9} = \pm 3</math>