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Mathematics 21 Online
OpenStudy (1645323):

factor:y=-x^2-6x-9

OpenStudy (hoblos):

use : a^2 + 2ab + b^2 = (a+b)^2 -x^2-6x-9 = -(x^2+6x+9) = -( x^2 +2(3)x + 3^2) = -(x+3)^2

OpenStudy (1645323):

ok

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