1. x^2y-3x^2y=?
2. 10y^2+0.5y^2=?
3. -1/2a^2bc+1/2cba^2=?
4. 1/4mn-1/3mn+7=?
5. 7ab-3a^2b^2+7+8ab^2+3a^2b^2-3-7ab=?
6. 3x^3-3x^2-y^2+5y+x^2-5y+y^2=?
要过程、谢谢、紧急、速度解答、thank~
1. x^2y-3x^2y=?
2. 10y^2+0.5y^2=?
3. -1/2a^2bc+1/2cba^2=?
4. 1/4mn-1/3mn+7=?
5. 7ab-3a^2b^2+7+8ab^2+3a^2b^2-3-7ab=?
6. 3x^3-3x^2-y^2+5y+x^2-5y+y^2=?
要过程、谢谢、紧急、速度解答、thank~
1:
x²y-3x²y
=-2x²y
2:
10y²+0.5y²
=10.5y²
3:
-0.5a²bc+0.5cba²
=-0.5a²bc+0.5a²bc
=0
4:
1/4mn-1/3mn+7
=3/12mn-4/12mn+7
=-1/mn+7
5:7ab-3a²b²+7+8ab²+3a²b²-3-7ab
=(7ab-7ab)+(-3a²b²+3a²b²)+8ab²+(7-3)
=8ab²+4
6:
3x³-3x²-y²+5y+x²-5y+y²
=3x³+(-3x²+x²)+(-y²+y²)+(5y-5y)
=3x³-2x²
=x²(3x-2)
1. x^2y-3x^2y=-2x^2y
2. 10y^2+0.5y^2=10.5y^2
3. -1/2a^2bc+1/2cba^2=0
4. 1/4mn-1/3mn+7=7-1/12mn
5. 7ab-3a^2b^2+7+8ab^2+3a^2b^2-3-7ab=4+8ab^2
6. 3x^3-3x^2-y^2+5y+x^2-5y+y^2=3x^3-2x^2