把(a+b)当成一个固式,合并下列同类项0.5(a+b)^2-3/2(a+b)^2y+38/11(a+b)^2y0.5(a+b)^2-3/2(a+b)^2y+38/11(a+b)^2y3(a+b)^2-(a+b)+2(a+b)^2-(a+b)^3+4(a+b)---------------------------------合并同列项a^2-3a+5+3a^2+2a-7x^2-5xy+yx-2x^2

Question

把(a+b)当成一个固式,合并下列同类项0.5(a+b)^2-3/2(a+b)^2y+38/11(a+b)^2y
0.5(a+b)^2-3/2(a+b)^2y+38/11(a+b)^2y
3(a+b)^2-(a+b)+2(a+b)^2-(a+b)^3+4(a+b)
---------------------------------
合并同列项
a^2-3a+5+3a^2+2a-7
x^2-5xy+yx-2x^2

Answer 1

0.5(a+b)^2-3/2(a+b)^2y+38/11(a+b)^2y
=0.5(a+b)^2+(-3/2+38/11)(a+b)^2y
=0.5(a+b)^2+43/22(a+b)^2y
3(a+b)^2-(a+b)+2(a+b)^2-(a+b)^3+4(a+b)
=(3+2)(a+b)^2+(-1+4)(a+b)-(a+b)^3
=5(a+b)^2+3(a+b)-(a+b)^3
a^2-3a+5+3a^2+2a-7
=4a^2-a-2
x^2-5xy+yx-2x^2
=-X^2-4Xy.