victoria166
victoria166 victoria166
  • 18-05-2017
  • Mathematics
contestada

what number must you add to complete the square x^2+2x=18

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bd3331401
bd3331401 bd3331401
  • 18-05-2017
Add 1 to both sides
x^2 + 2x + 1 = 18 + 1 
left side is the square of the sum 
(x + 1)^2 = 19
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