(2a-1)²(1+2a)²(4a²+1)²怎样计算?
1-a-b/a+2a/a²-b²/a²+4ab+4b² 求化简 ,
1²-2²+3²-4²+5²-6²+…-100²+
计算; [(-8)²-2×(-8)×1/4]÷(-27) 化简:5a²-[a²-[a&su
数学因式分解计算(a²-b²)/(a²b-ab²)÷ [1+(a²+b
分式计算,(1)a²-4b²\3ab² × ab\a-2b (2)x²-x\x-
1.计算:1²+4²+6²+7²=102,2²+3²+5&s
|a-4|+(b+1)²=0求5(ab²-2a²b)-(4ab²-2a²
2a²b-[3ab²-4(ab²-3/4a²b)-1/2ab²,其中a
2(a²+b²)(a+b)²-(a²-b²)²
(2²+4²+6²+.+98²+100²)-(1²+3&su
先化简,再求值:(a-1)/(a+2)*(a²-4)/(a²-2a+1)÷1/(a²-1)
设复数z=(a²-1)+(a²-3a+2)i,若z²