Question 359055
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Hi,
{{{ (3x^2-2xy+y^2)+(-6x^2-7xy-y^2)+(x^2+xy-4y^2) }}}
Adding by combining like terms
{{{ 3x^2-2xy+y^2 + -6x^2-7xy-y^2 + x^2+xy-4y^2 }}}
{{{ 3x^2-6x^2 + x^2 -2xy -7xy +xy +y^2 -y^2 -4y^2 }}}
{{{ -2x^2 -8xy -4y^2 }}} or {{{ -2(x^2 +4xy +2y^2) }}}