Gal6mera9stcr
Gal6mera9stcr Gal6mera9stcr
  • 11-06-2016
  • Mathematics
contestada

Solve the quadratic equation by completing the square. x2 + 6x + 7 = 0

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caylus
caylus caylus
  • 11-06-2016
Hello,

x²+2*3x+3²+7-9=0
==>(x+3)²-2=0
==>(x+3-√2)(x+3+√2)=0
==> x=-3+√2 or x=-3-√2
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