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What number complete the square x^2 +\- bx

What number complete the square x^2 +\- bx
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2 votes
What number complete the square x^2 +\- bx

User Celdus
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1 Answer

5 votes
take 1/2 of b and squaer it so (b/2)^2 would complete the square (sign doesn't matter becaus when squareing, sign goes positive)
User Pavel Komarov
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7.7k points
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