8x+2y+(5x-2y) X^2+(-3x^2-2y+1) 3a-(4b-2a+1)

问题描述:

8x+2y+(5x-2y) X^2+(-3x^2-2y+1) 3a-(4b-2a+1)

化简么?
8x+2y+(5x-2y) (去括号)
=8x+2y+5x-2y (合并同类项)
=13x
X^2+(-3x^2-2y+1)
=x²-3x²-2y+1
=-2x²-2y+1
3a-(4b-2a+1)
=3a-4b+2a+1
=5a-4b+1