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horsena [70]
4 years ago
10

Solve the equation using the method of completing the square 2x^2+16x-8=0

Mathematics
1 answer:
hichkok12 [17]4 years ago
5 0
2x^2+16x-8=0\\
x^2+8x-4=0\\
x^2+8x+16-20=0\\
(x+4)^2=20\\
x+4=\sqrt{20} \vee x+4=-\sqrt{20}\\
x=-4+2\sqrt5 \vee x=-4-2\sqrt5
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