If x^2-16>0 which of the following must be true ?
A.-4

• Answer is -4>x>4,Only acceptable.
  Because,Example,
  (-5)^2=25,
  25-16=9>0.
• 11 years agoHelpfull: Yes(20) No(3)
• x should be greater then 4 and less then -4. because sqr of 4 is 16...
• 11 years agoHelpfull: Yes(8) No(1)
• x^2>16=x>(+ - )4=x 4 so ans is -4>x>4
• 11 years agoHelpfull: Yes(2) No(1)
• ans is -4>x>4
  
• 11 years agoHelpfull: Yes(1) No(3)
• ans is -44 sub itx=-5or +5 25-16=9>0
• 11 years agoHelpfull: Yes(0) No(3)
• x is greatr thn + - 4
• 11 years agoHelpfull: Yes(0) No(2)
• x^2>16
  x>4
  ans=x>4
• 11 years agoHelpfull: Yes(0) No(0)
• x^2-16>0
  x^2>16
  x>+4 or -4
  ans:-4+4
• 11 years agoHelpfull: Yes(0) No(0)
• X^2-16>0=x^2-4^2=(x-4)(x+4)>0 or x -4>x
• 11 years agoHelpfull: Yes(0) No(0)
• -4
• 11 years agoHelpfull: Yes(0) No(0)