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anonymous
 4 years ago
Solve x2 + 4x – 12 = 0 by completing the square.
Please help!
anonymous
 4 years ago
Solve x2 + 4x – 12 = 0 by completing the square. Please help!

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myininaya
 4 years ago
Best ResponseYou've already chosen the best response.1\[x^2+4x=12\] added 12 on both sides

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.1\[x^2+4x+4=12+4\] added 4 on both sides to complete the square on the left hand side

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.1Now take square root of both sides don't forget the plus or minus

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.1\[x+2 = \pm \sqrt{16}\] \[x+2= \pm 4\]

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.1Now subtract 2 on both sides \[x=2 \pm 4\] this means we have two values for x \[x=2+4 \text{ or } x=24\]

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.1\[x=2 \text{ or } x=6\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[x ^{2}+4x+416=0 \rightarrow (x+2)^2=16 \rightarrow x+2= \pm 4;\]; x=2 and x=6

Hero
 4 years ago
Best ResponseYou've already chosen the best response.0x2 + 4x – 12 = 0 x^2+6x2x12 =0 x(x+6)2(x+6) = 0 (x+6)(x2) = 0 x = 6,2
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