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Square root of 9
So some mandems are saying that the square root of 9 is +/-3
But i am saying square root of 9 is only 3
But wikipedia saying dat it's +/-3
Whats the right answer pls
Posted from TSR Mobile
But i am saying square root of 9 is only 3
But wikipedia saying dat it's +/-3
Whats the right answer pls
Posted from TSR Mobile
Original post by C1 MAY 13
So some mandems are saying that the square root of 9 is +/-3
But i am saying square root of 9 is only 3
But wikipedia saying dat it's +/-3
Whats the right answer pls
Posted from TSR Mobile
But i am saying square root of 9 is only 3
But wikipedia saying dat it's +/-3
Whats the right answer pls
Posted from TSR Mobile
+/-3
-3 x -3 =9
3 x 3 = 9
Original post by C1 MAY 13
So some mandems are saying that the square root of 9 is +/-3
But i am saying square root of 9 is only 3
But wikipedia saying dat it's +/-3
Whats the right answer pls
Posted from TSR Mobile
But i am saying square root of 9 is only 3
But wikipedia saying dat it's +/-3
Whats the right answer pls
Posted from TSR Mobile
http://www.thestudentroom.co.uk/showthread.php?t=3173187
THE square root of 9 refers to the positive square root. But you can say that both 3 and -3 are square roots of 9. Things become clearer when using the symbol
Unparseable latex formula:
which always refers to the positive square root.\sqrt
(edited 8 years ago)
Original post by notnek
http://www.thestudentroom.co.uk/showthread.php?t=3173187
THE square root of 9 refers to the positive square root. But you can say that both 3 and -3 are square roots of 9. Things become clearer when using the symbol
THE square root of 9 refers to the positive square root. But you can say that both 3 and -3 are square roots of 9. Things become clearer when using the symbol
Unparseable latex formula:
which always refers to the positive square root.\sqrt
So 9 to the power half is 3 only?
Posted from TSR Mobile
Original post by Lissy14
+/-3
-3 x -3 =9
3 x 3 = 9
-3 x -3 =9
3 x 3 = 9
Posted from TSR Mobile
Original post by C1 MAY 13
Yes.
Original post by C1 MAY 13
... are you annoyed at the answer or at me? XD
Original post by notnek
Yes.
Thank you
That means that edexcel c1 book is incorrect!
Posted from TSR Mobile
Original post by Lissy14
... are you annoyed at the answer or at me? XD
Hehe, no. I am just thinking, that is all
Posted from TSR Mobile
Original post by C1 MAY 13
I doubt it. What does the textbook exactly say? Or tell me the page number.
Original post by notnek
I doubt it. What does the textbook exactly say?
Page 9
It says 9^1/2
Is +/-3
Posted from TSR Mobile
Closed as this thread is redundant due to the magic Sticky.
Original post by notnek
I doubt it. What does the textbook exactly say? Or tell me the page number.
It really does.
Don't go thinking this is correct though.
The book is wrong.
Original post by BuryMathsTutor
It really does.
Don't go thinking this is correct though.
The book is wrong.
Don't go thinking this is correct though.
The book is wrong.
Good grief. Sticky updated accordingly.
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