①整式计算:
1. (a+b)^42. (a+b)^53. (a-b)^34.(x+2y-1)(x-2y+1)-(x-2y-1)^2
5.4x²+4x+y²-2y+2=06.6.-7x2+6x+13x2-4x-5x2 7.2y+(-2y+5)-(3y+2)
8.( )+(4xy+7x2-y2)=10x2-xy.9.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3.
10.(3x+2)(3x-2)-5x(x-1)-(2x-1)²
②因式分解
①整式计算:
1. (a+b)^42. (a+b)^53. (a-b)^34.(x+2y-1)(x-2y+1)-(x-2y-1)^2
5.4x²+4x+y²-2y+2=06.6.-7x2+6x+13x2-4x-5x2 7.2y+(-2y+5)-(3y+2)
8.( )+(4xy+7x2-y2)=10x2-xy.9.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3.
10.(3x+2)(3x-2)-5x(x-1)-(2x-1)²
②因式分解