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Mrrafil [7]
3 years ago
15

Solve x2 + 6x = 7 by completing the square. What is the solution set of the equation?

Mathematics
1 answer:
Vikentia [17]3 years ago
4 0
x^2+6x=7
x^2+6x+9=7+9
(x+3)^2=16
(x+3)^2=4^2
x+3=4\lor x+3=-4
x=4-3\lor x=-4-3
\boxed{x=1\lor x=-7}
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