Question

1)x+4/x2+5x+4

2)x2-3x-18/x-6

3)x2-4/x2-5x+6

4)x2+10x+21/x2-9

Answer 1

x+4/x^2+5*x+4
6*x+4/x^2+4
6*x+4=-4/x^2
6*x^3+4*x^2=-4
6*x^3+4*x^2+4

x^2-3*x-18/x-6
x^2-3*x-6=18/x
x^3-3*x^2-6*x=18
x^3-3*x^2-6*x-18

x^2-4/x^2-5*x+6
x^2-5*x+6=4/x^2
x^4-5*x^3+6*x^2=4
x^4-5*x^3+6*x^2-4

x^2+10*x+21/x^2-9
x^2+10*x-9=-21/x^2
x^4+10*x^3-9*x^2=-21
x^4+10*x^3-9*x^2+21

Answer 2

6×15/5×12=
11×9/15×22=

18×21/14×36=

45×17/17×35=

81×12/24×45=

56×16/48×49=