Question 27469
{{{(5x^2 + 2x - 4)+( x^2 - 2x - 3)+(2x^2 - 4x - 3)}}}
adding like terms,we get
{{{5x^2 + 2x - 4}}}
{{{x^2  - 2x - 3}}}
{{{2x^2 - 4x - 3}}}
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{{{8x^2 -4x  -10}}}