Помогите, пожалуйста, отмечу "лучшим" сразу :) с задания

4[2(a-c)+x(a-c)]/(x²-4)=(a-c)(2+x)/(x-2)(x+2)=(a-c)/(x-2x=1,9  c=5,3  a=6,7(6,7-5,3)/(1,9-2)=1,4/(-0,1)=-1454(x+2)²-2(x²-4)-(x-2)²=x²4x²+16x+16-2x²+8-x²+4x-4-x²=020x=-20x=-16a)(x+y)/x*x²/a(x+y)=x/aб)9x^10/y^12в)(a-b)(a+b)/b*b/a(a+b)=(a-b)/aг)3(a-c)/a*1/(a-c)(a+c)=3/a(a+c)71)1/(x-y)-1/(x+y)=(x+y-x+y)/(x²-y²)=2y/(x²-y²)2)2y/(x²-y²)*(x²-y²)/y²=2/y8(a+3)(a-3)/2(a+4)*4(a+4)/(a+3)²=2(a-3)/(a+3)a=1,82(1,8-3)/(1,8+3)=-2*1,2/4,8=-2/4=-0,591)1/(x+y)*2(x+y)/xy=2/xy2)1/x²+1/y²+2/xy=(y²+x²+2xy)/x²y²=(x+y)²/x²y²3)(x+y)²/x²y²*x²y²/(x-y)(x+y)=(x+y)/(x-y)