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What number must you add to complete the square x^2+2x=18
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3 votes
What number must you add to complete the square x^2+2x=18

User Francesco Baruchelli
by
8.1k points

1 Answer

2 votes
Add 1 to both sides
x^2 + 2x + 1 = 18 + 1
left side is the square of the sum
(x + 1)^2 = 19
User Hirak Chhatbar
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8.4k points
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