2X-3= -(5/4X+3)
2x+5/4X=3-3
13/4x=0
x=0;
1/R=1/R1+1/R2
1/R-1/R1=1/R2
(R1-R)/RR1=1/R2
R2=RR1/(R1-R);
(X+M)/ M(X-1)=-4/5
(M-1/5)/M(-1/5-1)=-4/5
(M-1/5)/M=2/3
M-1/5=2/3M
1/3M=1/5
M=3/5;
X+1/X=3
X的平方+1/(X的平方)=(X+1/X)平方-2
=3的平方-2
=9-2
=7
2X-3= -(5/4X+3)
2x+5/4X=3-3
13/4x=0
x=0;
1/R=1/R1+1/R2
1/R-1/R1=1/R2
(R1-R)/RR1=1/R2
R2=RR1/(R1-R);
(X+M)/ M(X-1)=-4/5
(M-1/5)/M(-1/5-1)=-4/5
(M-1/5)/M=2/3
M-1/5=2/3M
1/3M=1/5
M=3/5;
X+1/X=3
X的平方+1/(X的平方)=(X+1/X)平方-2
=3的平方-2
=9-2
=7