Solve by completing the square x^2-x-7=0

glamrockqueen7 2021-01-19 Answered
Solve by completing the square x2x7=0
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Expert Answer

SabadisO
Answered 2021-01-20 Author has 108 answers
There's a -1 on the x in the middle. Half of -1 is 12. -1/2 squared is 14..
x2x+14147=0.
x2x+14294=0.
x2x+14=294.
(x12)2=294.
x12=±294.
x12=±292.
x=±292+12.
x=±29+12.
x=29+12.
of x=29+12.
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