Question

6.43.Упростите выражение​

Answer 1

Ответ:

1) 2a-3b/a²b - 4a -5b / ab²= 2ab-3b²-4a²+5ab/ a²b²= 7ab-3b²-4a²/a²b²

2) 5x²- 3y/ x²y+ 6x-2y²/x²y²=5x²y-3y²+6x-2y²/x²y²=5x²y-5y²+6x/x²y²

3) 5(2a-b)/8 - 3(a-4b)/2 + 7(a-b)/6= 10a-5b/8 - 3a-12b/2 + 7a-7b/6 = 30a-15b-36a+144b+28a-28b/24= 22a-101b/24

4) (x+y)²/6+(x-y)²/12- x²-y²/4 = x²+2xy+y²+x-2xy+y²-x²+y²/12 = 2x²+4xy+2y²+x²-2xy+y²-3x²+3y²/12=2xy+6y²/12=2(xy+2y²)/12=xy+2y²/6

Объяснение: