KayyTeeidn
Answered

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solve by completing the square:X^2+6x-12=0

Sagot :

Panoyinidn
x² + 6x  -12 = 0
x = -(6) +/- √((6)² - 4(1)(-12))
                     2(1)
x = -6 +/- √(36 + 48)
                   2
x = -6 +/- √(84)
              2
x = -6 +/- 2√(21)
               2
x = -3 + √(21)
x = -3 + √(21)      x = -3 - √(21)
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