Completing the Square ·
x\u00b2 + bx \u2192 (x + b/2)\u00b2 - (b/2)\u00b2
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Step
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Form
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State
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Square of side x (area x\u00b2)
Rectangles (width b/2)
Missing corner (b/2)\u00b2
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.com · Completing the Square