Mathematics, 24.06.2019 04:00, jasminecoronetti44

What is the missing term? (-14y^2 + 9y^2 -12y +3) + (2y^2 +? -6y -2) = (-3y^2 -15y +1)

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What is the missing term? (-14y^2 + 9y^2 -12y +3) + (2y^2 +? -6y -2) = (-3y^2 -15y +1)...