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OpenStudy (anonymous):
Solve the equation by completing the square. x² - 2x = 15
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hero (hero):
Hint: add (-2/2)^2 to both sides
OpenStudy (anonymous):
x^2-2x-15=0 x^2-5x+3x-15=0 x(x-5)+3(x-5)=0 (x+3)(x-5)=0 x=-3 or x=5
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