Mathematics, 10.01.2021 23:30 saraaaaaaaa20

what algebraic expression must be added to the sum of 3x^2+4x+8and 2x^2-6x+3 to give 9x^2-2x-5 as the result

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what algebraic expression must be added to the sum of 3x^2+4x+8and 2x^2-6x+3 to give 9x^2-2x-5 as th...