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Updated on: 09 Feb 2020, 04:24
Originally posted by Sajjad1994 on 05 Feb 2020, 09:49.
Last edited by Bunuel on 09 Feb 2020, 04:24, edited 1 time in total.
Last edited by Bunuel on 09 Feb 2020, 04:24, edited 1 time in total.
Edited the question.
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If a is even, b is odd, and \(a^2 + b^2 = x\) which of following must be true?
A. x is the square of an integer.
B. x is odd.
C. x is a multiple of a. x
D. is prime
E. \(a^2 - b^2 = x\)
A. x is the square of an integer.
B. x is odd.
C. x is a multiple of a. x
D. is prime
E. \(a^2 - b^2 = x\)
09 Feb 2020, 00:54
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SajjadAhmad
If a is even, b is odd, and \(a^2 + b^2 = x\) which of following must be true?
A. x is the square of an integer.
B. x is odd.
C. x is a multiple of a. x
D. is prime
E. \(a^2 + b^2 = x\)
A. x is the square of an integer.
B. x is odd.
C. x is a multiple of a. x
D. is prime
E. \(a^2 + b^2 = x\)
Solution:
- • \(a\) is even
- o It means \(a^2\) = \(even * even = even\)
- o It means,\( b^2 = odd*odd = odd\)
- o \(x\) must be odd.
shameekv1989
09 Feb 2020, 04:11
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i follow x will always be Odd but may I know when would E be not true? It is the given condition after all.
