Mathematics, 23.06.2021 09:30 deondra0803
For each party will operation write the letter that corresponds to the resulting expression from the list (5x^2+2x+1)+(6x^2-3x+9) is equivalent to expression blank. (-3x^2+6-12)+(5x+9) is equivalent to the expression blank. (8x+16)-(3x^2-3x-15) is Equivalent toexpression blank. ((5x^2+23x-7)-(x^2-4x+21) is equivalent to the expression blank. 
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