Question 75274
Line up the expressions vertically and add the like terms. For instance, 2x-2x-4x=0-4x=-4x. Do this for every term
{{{5x^2+2x-4}}}
{{{x^2 - 2x - 3}}}
+{{{2x^2 - 4x -3}}}
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{{{8x^2-4x-10}}} Here's the sum of the three expressions