Alex123456785A Alex123456785A

22-04-2015
Mathematics

Answered

Solve by completing the square
-x^2+8x-6=0

Answer :

Panoyin Panoyin

22-04-2015

-x² + 8x - 6 = 0
x = -(8) +/- √((8)² - 4(-1)(-6))
   2(-1)
x = -8 +/- √(64 - 20)
       -2
x = -8 +/- √(44)
-2
x = -8 +/- 2√(11)
-2
x = -8 + 2√(11)    x = -8 - 2√(11)
   -2 -2
x = 4 - √(11)    x = -8 + √(11)

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