A-A+
(1)计算:x2-y2x+y-4x(x-y)+y22x-y(2)化简求值:已知|a+12|+
问题详情
(1)计算:
(2)化简求值:已知|a+
(3)分解因式:2a3-4a2b+2ab2
参考答案
(1)原式=(x+y)(x-y)x+y-(2x-y)22x-y(2分)
=x-y-(2x-y)(3分)
=-x(4分)
(2)由题意,可得a+12=0,b-3=0
解得a=-12,b=3
原式=(2a+b)(2a+b+b-2a)÷2b(2分)
=2a+b
=2×(-12)+3
=2.(4分)
(3)原式=2a(a2-2ab+b2)(2分)
=2a(a-b)2(4分).
考点: