Question

Add

8x
${8x}^{2} + 7xy - {6y}^{2} + {4x}^{2} - 3xy + {2y}^{2} + ( {4x}^{2}) + xy - {y}^{2}$
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Answer 1

=(8x^2+7xy-6y^2)+(4x^2-3xy+2y^2)+(-4x^2+xy-y^2)

=8x^2+4x^2-4x^2+7xy-3xy+xy-6y^2+2y^2-y^2

=8x^2+5xy-5y^2

Answer 2

Step-by-step explanation:

this question's answer is 16x^2+5xy-5y^2