Question

数学书人教版初二下册，第23页第6题，要过程

Answer 1

(1)=x+2y/x+y × xy/x+2y × xy/x+y
=x²y²/x²+2xy+y²
=1/2xy
(2)=b²+a²/a²b² × a²b²/b²-a²
=b²+a²/b²-a²
(3)=9x^4/16y² × 2y/3x+x²/2y² × x/2y²
=3x^3/8y×1+x^3/4y^4
=3x^3+2x^3/8y²
=5x^3/8y²
(4)=(a+b)²/(a-b)² × 2(a-b)/3(a+b) - a²/(a+b)(a-b) × b/a
=2(a+b)/3(a-b) - ab/(a+b)(a-b)
=2(a+b)²-3ab/3(a+b)(a-b)
=2a²+ab+2b²/3(a+b)(a-b)

不知道对不对，仅供参考

Answer 2

望把题目补充出来

Answer 3

答毕。好题

Answer 4

题呢？