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Solving quadratic equation x2+8x=-15 by completing sqare method,find third term.

Answer» X^2 + 8X + 15 = 0
=> x^2 + 2(4)x + 15 + 1 - 1 = 0
=> x^2 + 2(4)x + 16 = 1
=> (x+4)^2 = 1

Hope it will help.


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