- #1
roger
- 318
- 0
I have a quick basic question , perhaps Arildno could could help me as he was very good at explaining before...
2 + root 9 = 5
If I add or subtract or multiply by a number , the equality holds as long as its done to both sides but if I square both sides it means I multiply one side by
(2 + root 9 ) while I multiply the other side by 5.
But nevertheless, the equality clearly remains valid.
Why is this ?
Thanks
Roger
2 + root 9 = 5
If I add or subtract or multiply by a number , the equality holds as long as its done to both sides but if I square both sides it means I multiply one side by
(2 + root 9 ) while I multiply the other side by 5.
But nevertheless, the equality clearly remains valid.
Why is this ?
Thanks
Roger