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if x*x-16>0, which of the following must be true?
-4>x>4
-4>x
Read Solution (Total 6)
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- a^2-b^2=(a+b)(a-b)
(x^2-16)=(x+4)(x-4)
so value of x can be 4 and -4
so -4>x>4(ans) - 12 years agoHelpfull: Yes(11) No(6)
- x*x - 16 > 0
x*x > 16
x > +-4
-4 > x > 4 - 12 years agoHelpfull: Yes(4) No(5)
- 1st part is right ans
- 12 years agoHelpfull: Yes(3) No(2)
- x*x-16 > 0
means x*x >16
means either x>4 or x - 12 years agoHelpfull: Yes(3) No(1)
- -4>x-16>0 is correct becasue the seconds case will take 4 as input and will result in the total of 0 as 4*4-16.
so option 1 is correct - 12 years agoHelpfull: Yes(2) No(1)
- 1st option is not correct...
as, -4 - 12 years agoHelpfull: Yes(1) No(1)
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