Question 644920
x^2-3x+7 + 3x^2+5x-9


(x^2+3x^2)+(-3x+5x)+(7-9)


(4x^2)+(2x)+(-2)


4x^2+2x-2


So x^2-3x+7 + 3x^2+5x-9 simplifies to 4x^2+2x-2


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