X乘x+2x+y乘y-6y+10等于多少?(过程写下来)急用!

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X乘x+2x+y乘y-6y+10等于多少?(过程写下来)急用!
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X乘x+2x+y乘y-6y+10等于多少?(过程写下来)急用!
X乘x+2x+y乘y-6y+10等于多少?(过程写下来)
急用!

X乘x+2x+y乘y-6y+10等于多少?(过程写下来)急用!
x^2+2x+y^2-6y+10
=x^2+2x+1+y^2-6y+9
=(x+1)^2+(y-3)^2

=x(x+2x+y)(y-6y+10)
=x(3x+y)(-5y+10)
=(3x^2+xy)(-5y+10)
=-15x^2y-5xy^2+30x^2+10xy