Solving 10 mixed fraction operation problems in grade two of junior high school

Solving 10 mixed fraction operation problems in grade two of junior high school

2 a+1－a+3 a2－4a－5÷a2－9 a2－3a－10.
The original solution = [x + 2 x (X-2) - X-1 (X-2) 2] &; X 4-x
=[(x + 2) (X-2) x (X-2) 2-x (x-1) x (X-2) 2] &
=X2-4-x2 + x x (X-2) 2 &; x4-x (integral operation)
=X-4x (X-2) 2 &; x4-x
=X-4 x (X-2) 2 &; (- xx-4) (the sign rule of fraction)
=- 1 (X-2) 2
Calculate x + y x 2-xy + (x 2-y 2x) 2 and ﹥ 8226; (1 Y-X) 3
The original solution = x + y x (X-Y) + (x + y) 2 (X-Y) 2x2 &; 1 (Y-X) 3
=x+y x(x－y)－(x+y)2 x2(x－y)
=x2+xy－x2－2xy－y2 x2(x－y)
=－xy－y2 x2(x－y)=－xy+y2 x2(x－y).
x－y+4xy x－y）（x+y－4xyx+y）
Answer x2-y2
[1 (a+b)2－1(a－b)2]÷（1a+b－1a－b）
Answer 2A (a + b) (a-b);
x x－y• y2 x+y－x4y x4－y4÷x2 x2+y2
The answer - XY x + y
3x－2 x2－x－2+（1－1x+1）÷（1+1x－1）
The answer is X2 (x + 1) (X-2);
（2x x+1+2 x－1+4x x2－1）×（2x x+1+2 x－1－4x x2－1）.
Answer 4
Don't copy