Question

Плиз пожалуйста все 3 задания

Answer 1

1
1)3/(3a-1):(5a-2)/(9a²-1)=3/(3a-1) *(3a-1)(3a+1)/(5a-2)=(9a+3)/(5a-2)
2)(7-a)/(5a-2)-(9a+3)/(5a-2)=(7-a-9a-3)/(5a-2)=(4-10a)/(5a-2)=
=-2(5a-2)/(5a-2)=-2
2
1)(a+x)/x-2x/(x-a)=(x²-a²-2x²)/x(x-a)=-(a²+x²)/x(x-a)
2)-(a²+x²)/x(x-a)=-1/x
3
1)1/(a+3b)+1/(a-3b)=(a-3b+a+3b)/(a-3b)(a+3b)=2a/(a-3b)(a+3b)
2)(a+3b)/2a *2a/(a+3b)(a-3b)=1/(a-3b)
3)1-1/(a-3b)=(a-3b-1)/(a-3b)